{
 "name": "The Phone Path headphone and source database",
 "url": "https://thephonepath.com/data/",
 "licence": "CC BY 4.0",
 "licence_url": "https://creativecommons.org/licenses/by/4.0/",
 "attribution": "The Phone Path — thephonepath.com",
 "note": "Sensitivity is stored in dB/mW. Where a manufacturer published it per volt it was converted with dB/mW = dB/V - 10*log10(1000/Z); the published value and unit are kept alongside so the conversion can be checked or undone. Amplifier power at loads the maker did not publish is derived by holding output voltage constant between and beyond the published loads, which understates rather than flatters. The basis column says which is which for every figure.",
 "headphones": 402,
 "sources": 156,
 "data": [
  {
   "name": "EarStudio ES100 MK2",
   "type": "bt",
   "tier": "budget",
   "price_usd": 90,
   "power_mw_32_ohm": 60.0,
   "basis_32_ohm": "unverified",
   "power_mw_150_ohm": 20.0,
   "basis_150_ohm": "unverified",
   "power_mw_300_ohm": 10.0,
   "basis_300_ohm": "unverified",
   "power_mw_600_ohm": 5.0,
   "basis_600_ohm": "unverified",
   "output_impedance_ohm": 0.5,
   "output_noise_uv": 3,
   "rated_output": "",
   "published_points": "",
   "confidence": "legacy",
   "source_url": "",
   "page": "https://thephonepath.com/sources/earstudio-es100-mk2/"
  },
  {
   "name": "FiiO BTR13",
   "type": "bt",
   "tier": "budget",
   "price_usd": 59,
   "power_mw_32_ohm": 100.0,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 20.7,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 10.0,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 5.0,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 0.6,
   "output_noise_uv": 1.0,
   "rated_output": "se",
   "published_points": "16ohm=120mW; 32ohm=100mW; 300ohm=10mW",
   "confidence": "high",
   "source_url": "https://www.fiio.com/BTR13_parameters",
   "page": "https://thephonepath.com/sources/fiio-btr13/"
  },
  {
   "name": "FiiO BTR15",
   "type": "bt",
   "tier": "budget",
   "price_usd": 109,
   "power_mw_32_ohm": 125,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 28.1,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 15.0,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 7.5,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 1.0,
   "output_noise_uv": 2.0,
   "rated_output": "se",
   "published_points": "16ohm=165mW; 32ohm=125mW; 300ohm=15mW",
   "confidence": "high",
   "source_url": "https://www.fiio.com/BTR15_parameters",
   "page": "https://thephonepath.com/sources/fiio-btr15/"
  },
  {
   "name": "FiiO BTR17",
   "type": "bt",
   "tier": "midfi",
   "price_usd": 199,
   "power_mw_32_ohm": 280,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 59.9,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 30.0,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 15.0,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 1.0,
   "output_noise_uv": 3.0,
   "rated_output": "se",
   "published_points": "16ohm=330mW; 32ohm=280mW; 300ohm=30mW",
   "confidence": "high",
   "source_url": "https://www.fiio.com/BTR17_parameters",
   "page": "https://thephonepath.com/sources/fiio-btr17/"
  },
  {
   "name": "FiiO BTR7",
   "type": "bt",
   "tier": "midfi",
   "price_usd": 199,
   "power_mw_32_ohm": 160,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 34.9,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 18.0,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 9.0,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 1.2,
   "output_noise_uv": 3.0,
   "rated_output": "se",
   "published_points": "16ohm=165mW; 32ohm=160mW; 300ohm=18mW",
   "confidence": "high",
   "source_url": "https://www.fiio.com/BTR7_parameters",
   "page": "https://thephonepath.com/sources/fiio-btr7/"
  },
  {
   "name": "iFi GO blu",
   "type": "bt",
   "tier": "midfi",
   "price_usd": 219,
   "power_mw_32_ohm": 165,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 35.2,
   "basis_150_ohm": "extrapolated",
   "power_mw_300_ohm": 17.6,
   "basis_300_ohm": "extrapolated",
   "power_mw_600_ohm": 8.8,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 1.0,
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "32ohm=165mW",
   "confidence": "high",
   "source_url": "https://doc.av-connection.com/Products/Ifi/iFi-GO-blu-Manual.pdf",
   "page": "https://thephonepath.com/sources/ifi-go-blu/"
  },
  {
   "name": "Qudelix 5K",
   "type": "bt",
   "tier": "budget",
   "price_usd": 109,
   "power_mw_32_ohm": 125,
   "basis_32_ohm": "voltage-bound",
   "power_mw_150_ohm": 26.7,
   "basis_150_ohm": "voltage-bound",
   "power_mw_300_ohm": 13.3,
   "basis_300_ohm": "voltage-bound",
   "power_mw_600_ohm": 6.7,
   "basis_600_ohm": "voltage-bound",
   "output_impedance_ohm": 0.4,
   "output_noise_uv": 3,
   "rated_output": "se",
   "published_points": "",
   "confidence": "high",
   "source_url": "https://www.qudelix.com/products/qudelix-5k",
   "page": "https://thephonepath.com/sources/qudelix-5k/"
  },
  {
   "name": "Shanling UP5",
   "type": "bt",
   "tier": "budget",
   "price_usd": 179,
   "power_mw_32_ohm": 112,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 23.9,
   "basis_150_ohm": "extrapolated",
   "power_mw_300_ohm": 11.9,
   "basis_300_ohm": "extrapolated",
   "power_mw_600_ohm": 6.0,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 0.6,
   "output_noise_uv": 4,
   "rated_output": "se",
   "published_points": "32ohm=112mW",
   "confidence": "medium",
   "source_url": "https://en.shanling.com/article/101306",
   "page": "https://thephonepath.com/sources/shanling-up5/"
  },
  {
   "name": "Aiyima A2 Pro",
   "type": "combo",
   "tier": "budget",
   "price_usd": 75,
   "power_mw_32_ohm": 150,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 32.0,
   "basis_150_ohm": "extrapolated",
   "power_mw_300_ohm": 16.0,
   "basis_300_ohm": "extrapolated",
   "power_mw_600_ohm": 8.0,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": "",
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "32ohm=150mW",
   "confidence": "medium",
   "source_url": "https://www.aiyima.com/products/aiyima-dac-a2-pro",
   "page": "https://thephonepath.com/sources/aiyima-a2-pro/"
  },
  {
   "name": "Benchmark DAC3 HGC",
   "type": "combo",
   "tier": "highend",
   "price_usd": 2399,
   "power_mw_32_ohm": 1172,
   "basis_32_ohm": "extrapolated",
   "power_mw_150_ohm": 250,
   "basis_150_ohm": "extrapolated",
   "power_mw_300_ohm": 125,
   "basis_300_ohm": "extrapolated",
   "power_mw_600_ohm": 62.5,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 0.11,
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "30ohm=1250mW",
   "confidence": "medium",
   "source_url": "https://benchmarkmedia.com/products/benchmark-dac3-hgc-digital-to-analog-audio-converter",
   "page": "https://thephonepath.com/sources/benchmark-dac3-hgc/"
  },
  {
   "name": "Fiio K7",
   "type": "combo",
   "tier": "budget",
   "price_usd": 199,
   "power_mw_32_ohm": 1220,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 269,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 140,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 70.0,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 1.0,
   "output_noise_uv": 3.1,
   "rated_output": "se",
   "published_points": "32ohm=1220mW; 300ohm=140mW",
   "confidence": "high",
   "source_url": "https://www.fiio.com/k7_parameters",
   "page": "https://thephonepath.com/sources/fiio-k7/"
  },
  {
   "name": "Fiio K9 Pro",
   "type": "combo",
   "tier": "midfi",
   "price_usd": 799,
   "power_mw_32_ohm": 2000,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 482,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 278,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 139,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 1.0,
   "output_noise_uv": 2.0,
   "rated_output": "se",
   "published_points": "16ohm=1100mW; 32ohm=2000mW; 300ohm=278mW",
   "confidence": "high",
   "source_url": "https://www.fiio.com/k9pro_parameters",
   "page": "https://thephonepath.com/sources/fiio-k9-pro/"
  },
  {
   "name": "Fosi Audio K7",
   "type": "combo",
   "tier": "budget",
   "price_usd": 199,
   "power_mw_32_ohm": 600,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 128,
   "basis_150_ohm": "extrapolated",
   "power_mw_300_ohm": 64.0,
   "basis_300_ohm": "extrapolated",
   "power_mw_600_ohm": 32.0,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": "",
   "output_noise_uv": 2.5,
   "rated_output": "se",
   "published_points": "32ohm=600mW",
   "confidence": "medium",
   "source_url": "https://fosiaudio.com/pages/fosi-audio-k7-dac-amp",
   "page": "https://thephonepath.com/sources/fosi-audio-k7/"
  },
  {
   "name": "iFi Zen DAC 3",
   "type": "combo",
   "tier": "budget",
   "price_usd": 229,
   "power_mw_32_ohm": 210,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 49.9,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 28.4,
   "basis_300_ohm": "interpolated",
   "power_mw_600_ohm": 18.0,
   "basis_600_ohm": "published",
   "output_impedance_ohm": 1,
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "32ohm=210mW; 600ohm=18mW",
   "confidence": "high",
   "source_url": "https://downloads.ifi-audio.com/wp-content/uploads/2024/04/ZEN-DAC-3-User-Manual_Ver1.0-1.pdf",
   "page": "https://thephonepath.com/sources/ifi-zen-dac-3/"
  },
  {
   "name": "JDS Labs Element III MK2",
   "type": "combo",
   "tier": "midfi",
   "price_usd": 449,
   "power_mw_32_ohm": 1300,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 584,
   "basis_150_ohm": "published",
   "power_mw_300_ohm": 292,
   "basis_300_ohm": "interpolated",
   "power_mw_600_ohm": 146,
   "basis_600_ohm": "published",
   "output_impedance_ohm": 0.7,
   "output_noise_uv": 1.5,
   "rated_output": "se",
   "published_points": "32ohm=1300mW; 32ohm=2300mW; 150ohm=584mW; 600ohm=146mW",
   "confidence": "high",
   "source_url": "https://jdslabs.com/product/element-iii/",
   "page": "https://thephonepath.com/sources/jds-labs-element-iii-mk2/"
  },
  {
   "name": "JDS Labs Element IV",
   "type": "combo",
   "tier": "midfi",
   "price_usd": 549,
   "power_mw_32_ohm": 3200,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 692,
   "basis_150_ohm": "published",
   "power_mw_300_ohm": 347,
   "basis_300_ohm": "interpolated",
   "power_mw_600_ohm": 174,
   "basis_600_ohm": "published",
   "output_impedance_ohm": 1,
   "output_noise_uv": 2,
   "rated_output": "se",
   "published_points": "32ohm=3200mW; 150ohm=692mW; 600ohm=174mW",
   "confidence": "high",
   "source_url": "https://blog.jdslabs.com/2024/11/introducing-element-iv-and-core/",
   "page": "https://thephonepath.com/sources/jds-labs-element-iv/"
  },
  {
   "name": "Matrix element M2",
   "type": "combo",
   "tier": "highend",
   "price_usd": 2999,
   "power_mw_32_ohm": 1164,
   "basis_32_ohm": "extrapolated",
   "power_mw_150_ohm": 380,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 280,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 140,
   "basis_600_ohm": "published",
   "output_impedance_ohm": 11,
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "33ohm=1200mW; 300ohm=280mW; 600ohm=140mW",
   "confidence": "medium",
   "source_url": "https://www.matrix-digi.com/product/10/element_M2",
   "page": "https://thephonepath.com/sources/matrix-element-m2/"
  },
  {
   "name": "Matrix mini-i Pro 4",
   "type": "combo",
   "tier": "highend",
   "price_usd": 1499,
   "power_mw_32_ohm": 1164,
   "basis_32_ohm": "extrapolated",
   "power_mw_150_ohm": 366,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 260,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 130,
   "basis_600_ohm": "published",
   "output_impedance_ohm": 11,
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "33ohm=1200mW; 300ohm=260mW; 600ohm=130mW",
   "confidence": "medium",
   "source_url": "https://www.matrix-digi.com/product/94/mini-i_Pro_4",
   "page": "https://thephonepath.com/sources/matrix-mini-i-pro-4/"
  },
  {
   "name": "Questyle CMA Fifteen",
   "type": "combo",
   "tier": "highend",
   "price_usd": 2499,
   "power_mw_32_ohm": 1500,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 344,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 188,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 94.0,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": "",
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "32ohm=1500mW; 300ohm=188mW",
   "confidence": "medium",
   "source_url": "https://questyleshop.com/pages/cma-fifteen-specification",
   "page": "https://thephonepath.com/sources/questyle-cma-fifteen/"
  },
  {
   "name": "SMSL DO400",
   "type": "combo",
   "tier": "midfi",
   "price_usd": 520,
   "power_mw_32_ohm": 3000,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 938,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 700,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 350,
   "basis_600_ohm": "published",
   "output_impedance_ohm": 0,
   "output_noise_uv": "",
   "rated_output": "bal",
   "published_points": "16ohm=6000mW; 32ohm=3000mW; 300ohm=700mW; 600ohm=350mW",
   "confidence": "medium",
   "source_url": "https://www.smsl-audio.com/upload/portal/download/DO400Manual.pdf",
   "page": "https://thephonepath.com/sources/smsl-do400/"
  },
  {
   "name": "Topping DX5",
   "type": "combo",
   "tier": "midfi",
   "price_usd": 449,
   "power_mw_32_ohm": 1800,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 433,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 250,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 125,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 0.1,
   "output_noise_uv": "",
   "rated_output": "bal",
   "published_points": "32ohm=1800mW; 300ohm=250mW",
   "confidence": "low",
   "source_url": "https://apos.audio/products/topping-dx5-dac-amp",
   "page": "https://thephonepath.com/sources/topping-dx5/"
  },
  {
   "name": "Violectric V226",
   "type": "combo",
   "tier": "highend",
   "price_usd": 1600,
   "power_mw_32_ohm": 2200,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 2624,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 1800,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 900,
   "basis_600_ohm": "published",
   "output_impedance_ohm": 0.25,
   "output_noise_uv": 6.15,
   "rated_output": "se",
   "published_points": "16ohm=1500mW; 32ohm=2200mW; 50ohm=2800mW; 100ohm=3500mW; 300ohm=1800mW; 600ohm=900mW",
   "confidence": "medium",
   "source_url": "https://www.violectric.de/media/pdf/d1/b3/e7/Violectric_DHA_V226_TechGuide_EN_2021_07.pdf",
   "page": "https://thephonepath.com/sources/violectric-v226/"
  },
  {
   "name": "Astell&Kern SP3000",
   "type": "dap",
   "tier": "highend",
   "price_usd": 3700,
   "power_mw_32_ohm": 340,
   "basis_32_ohm": "voltage-bound",
   "power_mw_150_ohm": 72.6,
   "basis_150_ohm": "voltage-bound",
   "power_mw_300_ohm": 36.3,
   "basis_300_ohm": "voltage-bound",
   "power_mw_600_ohm": 18.1,
   "basis_600_ohm": "voltage-bound",
   "output_impedance_ohm": 0.7,
   "output_noise_uv": 3,
   "rated_output": "se",
   "published_points": "",
   "confidence": "high",
   "source_url": "https://www.astellnkern.com/en/product/view.php?idx=133",
   "page": "https://thephonepath.com/sources/astellandkern-sp3000/"
  },
  {
   "name": "Astell&Kern SR35",
   "type": "dap",
   "tier": "highend",
   "price_usd": 800,
   "power_mw_32_ohm": 300,
   "basis_32_ohm": "voltage-bound",
   "power_mw_150_ohm": 64.1,
   "basis_150_ohm": "voltage-bound",
   "power_mw_300_ohm": 32.0,
   "basis_300_ohm": "voltage-bound",
   "power_mw_600_ohm": 16.0,
   "basis_600_ohm": "voltage-bound",
   "output_impedance_ohm": 1.1,
   "output_noise_uv": 4,
   "rated_output": "se",
   "published_points": "",
   "confidence": "high",
   "source_url": "https://www.astellnkern.com/en/product/view.php?idx=138",
   "page": "https://thephonepath.com/sources/astellandkern-sr35/"
  },
  {
   "name": "Cayin N3 Ultra",
   "type": "dap",
   "tier": "midfi",
   "price_usd": 649,
   "power_mw_32_ohm": 250,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 53.3,
   "basis_150_ohm": "extrapolated",
   "power_mw_300_ohm": 26.7,
   "basis_300_ohm": "extrapolated",
   "power_mw_600_ohm": 13.3,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 0.5,
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "32ohm=250mW; 32ohm=250mW",
   "confidence": "medium",
   "source_url": "https://cayin.com/ca-inhalte/uploads/2024/09/N3-Ultra-Digitaler-Audio-Player_deutsch.pdf",
   "page": "https://thephonepath.com/sources/cayin-n3-ultra/"
  },
  {
   "name": "FiiO JM21",
   "type": "dap",
   "tier": "budget",
   "price_usd": 199,
   "power_mw_32_ohm": 245,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 55.6,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 30.0,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 15.0,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 1,
   "output_noise_uv": 1.6,
   "rated_output": "se",
   "published_points": "16ohm=360mW; 32ohm=245mW; 300ohm=30mW",
   "confidence": "high",
   "source_url": "https://www.fiio.com/jm21_parameters",
   "page": "https://thephonepath.com/sources/fiio-jm21/"
  },
  {
   "name": "FiiO M11S",
   "type": "dap",
   "tier": "midfi",
   "price_usd": 499,
   "power_mw_32_ohm": 200,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 44.1,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 23.0,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 11.5,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 1.5,
   "output_noise_uv": 1.8,
   "rated_output": "se",
   "published_points": "16ohm=300mW; 32ohm=200mW; 300ohm=23mW",
   "confidence": "high",
   "source_url": "https://www.fiio.com/M11S_parameters",
   "page": "https://thephonepath.com/sources/fiio-m11s/"
  },
  {
   "name": "FiiO M17",
   "type": "dap",
   "tier": "highend",
   "price_usd": 1799,
   "power_mw_32_ohm": 500,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 115,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 63.0,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 31.5,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 1,
   "output_noise_uv": 3.5,
   "rated_output": "se",
   "published_points": "16ohm=740mW; 32ohm=500mW; 300ohm=63mW",
   "confidence": "high",
   "source_url": "https://www.fiio.com/M17_parameters",
   "page": "https://thephonepath.com/sources/fiio-m17/"
  },
  {
   "name": "FiiO M23",
   "type": "dap",
   "tier": "midfi",
   "price_usd": 699,
   "power_mw_32_ohm": 125,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 28.1,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 15.0,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 7.5,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 1,
   "output_noise_uv": 1.9,
   "rated_output": "se",
   "published_points": "16ohm=235mW; 32ohm=125mW; 300ohm=15mW",
   "confidence": "high",
   "source_url": "https://www.fiio.com/m23_parameters",
   "page": "https://thephonepath.com/sources/fiio-m23/"
  },
  {
   "name": "HiBy R6 Pro II",
   "type": "dap",
   "tier": "highend",
   "price_usd": 750,
   "power_mw_32_ohm": 750,
   "basis_32_ohm": "unverified",
   "power_mw_150_ohm": 280,
   "basis_150_ohm": "unverified",
   "power_mw_300_ohm": 140,
   "basis_300_ohm": "unverified",
   "power_mw_600_ohm": 70.0,
   "basis_600_ohm": "unverified",
   "output_impedance_ohm": 0.6,
   "output_noise_uv": 4,
   "rated_output": "",
   "published_points": "",
   "confidence": "legacy",
   "source_url": "",
   "page": "https://thephonepath.com/sources/hiby-r6-pro-ii/"
  },
  {
   "name": "iBasso DX180",
   "type": "dap",
   "tier": "midfi",
   "price_usd": 480,
   "power_mw_32_ohm": 262,
   "basis_32_ohm": "extrapolated",
   "power_mw_150_ohm": 56.0,
   "basis_150_ohm": "extrapolated",
   "power_mw_300_ohm": 28.0,
   "basis_300_ohm": "extrapolated",
   "power_mw_600_ohm": 14.0,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 0.6,
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "16ohm=525mW",
   "confidence": "high",
   "source_url": "https://www.ibasso.com/uploadfiles/download/DX180userguide.pdf",
   "page": "https://thephonepath.com/sources/ibasso-dx180/"
  },
  {
   "name": "iBasso DX260",
   "type": "dap",
   "tier": "highend",
   "price_usd": 949,
   "power_mw_32_ohm": 262,
   "basis_32_ohm": "extrapolated",
   "power_mw_150_ohm": 56.0,
   "basis_150_ohm": "extrapolated",
   "power_mw_300_ohm": 28.0,
   "basis_300_ohm": "extrapolated",
   "power_mw_600_ohm": 14.0,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 0.6,
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "16ohm=525mW",
   "confidence": "high",
   "source_url": "https://ibasso.com/uploadfiles/download/DX260userguide.pdf",
   "page": "https://thephonepath.com/sources/ibasso-dx260/"
  },
  {
   "name": "Shanling M3 Ultra",
   "type": "dap",
   "tier": "midfi",
   "price_usd": 479,
   "power_mw_32_ohm": 140,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 29.9,
   "basis_150_ohm": "extrapolated",
   "power_mw_300_ohm": 14.9,
   "basis_300_ohm": "extrapolated",
   "power_mw_600_ohm": 7.5,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 1,
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "32ohm=140mW",
   "confidence": "high",
   "source_url": "https://en.shanling.com/article-IntroM3U.html",
   "page": "https://thephonepath.com/sources/shanling-m3-ultra/"
  },
  {
   "name": "Sony NW-A306",
   "type": "dap",
   "tier": "midfi",
   "price_usd": 350,
   "power_mw_32_ohm": 17.5,
   "basis_32_ohm": "extrapolated",
   "power_mw_150_ohm": 3.7,
   "basis_150_ohm": "extrapolated",
   "power_mw_300_ohm": 1.9,
   "basis_300_ohm": "extrapolated",
   "power_mw_600_ohm": 0.9,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 1.5,
   "output_noise_uv": 5,
   "rated_output": "se",
   "published_points": "16ohm=35mW",
   "confidence": "medium",
   "source_url": "https://www.sony-asia.com/electronics/support/digital-music-players-nw-nwz-a-series/nw-a306/specifications",
   "page": "https://thephonepath.com/sources/sony-nw-a306/"
  },
  {
   "name": "Sony NW-WM1AM2",
   "type": "dap",
   "tier": "highend",
   "price_usd": 1399,
   "power_mw_32_ohm": 30.0,
   "basis_32_ohm": "extrapolated",
   "power_mw_150_ohm": 6.4,
   "basis_150_ohm": "extrapolated",
   "power_mw_300_ohm": 3.2,
   "basis_300_ohm": "extrapolated",
   "power_mw_600_ohm": 1.6,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 1,
   "output_noise_uv": 3,
   "rated_output": "se",
   "published_points": "16ohm=60mW",
   "confidence": "medium",
   "source_url": "https://www.sony-asia.com/electronics/support/digital-music-players-nw-wm-series/nw-wm1am2/specifications",
   "page": "https://thephonepath.com/sources/sony-nw-wm1am2/"
  },
  {
   "name": "ART HeadAmp 4 Pro",
   "type": "desktop",
   "tier": "budget",
   "price_usd": 130,
   "power_mw_32_ohm": 98.2,
   "basis_32_ohm": "interpolated",
   "power_mw_150_ohm": 66.7,
   "basis_150_ohm": "extrapolated",
   "power_mw_300_ohm": 33.3,
   "basis_300_ohm": "extrapolated",
   "power_mw_600_ohm": 16.7,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 47.0,
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "30ohm=100mW; 100ohm=100mW",
   "confidence": "medium",
   "source_url": "https://artproaudio.com/imgs/file/Manuals/om-HeadAmp4Prp-v103-6-21-18.pdf",
   "page": "https://thephonepath.com/sources/art-headamp-4-pro/"
  },
  {
   "name": "Benchmark HPA4",
   "type": "desktop",
   "tier": "highend",
   "price_usd": 3499,
   "power_mw_32_ohm": 3354,
   "basis_32_ohm": "interpolated",
   "power_mw_150_ohm": 829,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 440,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 220,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 0.0,
   "output_noise_uv": 2.45,
   "rated_output": "se",
   "published_points": "16ohm=6000mW; 45ohm=2600mW; 200ohm=640mW; 300ohm=440mW",
   "confidence": "medium",
   "source_url": "https://benchmarkmedia.com/products/hpa4",
   "page": "https://thephonepath.com/sources/benchmark-hpa4/"
  },
  {
   "name": "Bottlehead Crack (OTL kit)",
   "type": "desktop",
   "tier": "midfi",
   "price_usd": 375,
   "power_mw_32_ohm": 271,
   "basis_32_ohm": "source-impedance",
   "power_mw_150_ohm": 403,
   "basis_150_ohm": "source-impedance",
   "power_mw_300_ohm": 333,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 227,
   "basis_600_ohm": "source-impedance",
   "output_impedance_ohm": 120.0,
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "300ohm=333.3mW",
   "confidence": "high",
   "source_url": "https://bottlehead.com/products/crack-1-1-otl-headphone-amplifier-kit",
   "page": "https://thephonepath.com/sources/bottlehead-crack-otl-kit/"
  },
  {
   "name": "Bryston BHA-1",
   "type": "desktop",
   "tier": "highend",
   "price_usd": 2395,
   "power_mw_32_ohm": 500,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 358,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 445,
   "basis_300_ohm": "interpolated",
   "power_mw_600_ohm": 667,
   "basis_600_ohm": "published",
   "output_impedance_ohm": "",
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "32ohm=500mW; 600ohm=667mW",
   "confidence": "medium",
   "source_url": "https://bryston.com/wp-content/uploads/2020/06/BHA1_BROCHURE.pdf",
   "page": "https://thephonepath.com/sources/bryston-bha-1/"
  },
  {
   "name": "Burson Soloist 3X GT",
   "type": "desktop",
   "tier": "highend",
   "price_usd": 2799,
   "power_mw_32_ohm": 4000,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 650,
   "basis_150_ohm": "published",
   "power_mw_300_ohm": 320,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 160,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 0.5,
   "output_noise_uv": 1.5,
   "rated_output": "se",
   "published_points": "16ohm=5000mW; 32ohm=4000mW; 100ohm=1900mW; 150ohm=650mW; 300ohm=320mW",
   "confidence": "medium",
   "source_url": "https://www.bursonaudio.com/products/soloist-3x-grand-tourer/",
   "page": "https://thephonepath.com/sources/burson-soloist-3x-gt/"
  },
  {
   "name": "Cayin HA-6A",
   "type": "desktop",
   "tier": "highend",
   "price_usd": 1800,
   "power_mw_32_ohm": 3000,
   "basis_32_ohm": "unverified",
   "power_mw_150_ohm": 1500,
   "basis_150_ohm": "unverified",
   "power_mw_300_ohm": 900,
   "basis_300_ohm": "unverified",
   "power_mw_600_ohm": 450,
   "basis_600_ohm": "unverified",
   "output_impedance_ohm": 2,
   "output_noise_uv": 25,
   "rated_output": "",
   "published_points": "",
   "confidence": "legacy",
   "source_url": "",
   "page": "https://thephonepath.com/sources/cayin-ha-6a/"
  },
  {
   "name": "Chord Hugo TT 2",
   "type": "desktop",
   "tier": "highend",
   "price_usd": 5000,
   "power_mw_32_ohm": 8000,
   "basis_32_ohm": "unverified",
   "power_mw_150_ohm": 4000,
   "basis_150_ohm": "unverified",
   "power_mw_300_ohm": 2000,
   "basis_300_ohm": "unverified",
   "power_mw_600_ohm": 1000,
   "basis_600_ohm": "unverified",
   "output_impedance_ohm": 0.05,
   "output_noise_uv": 1.5,
   "rated_output": "",
   "published_points": "",
   "confidence": "legacy",
   "source_url": "",
   "page": "https://thephonepath.com/sources/chord-hugo-tt-2/"
  },
  {
   "name": "Ferrum OOR",
   "type": "desktop",
   "tier": "highend",
   "price_usd": 1995,
   "power_mw_32_ohm": 1067,
   "basis_32_ohm": "extrapolated",
   "power_mw_150_ohm": 800,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 400,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 200,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 0.3,
   "output_noise_uv": 1.5,
   "rated_output": "se",
   "published_points": "60ohm=2000mW; 300ohm=400mW",
   "confidence": "high",
   "source_url": "https://ferrum.audio/oor/",
   "page": "https://thephonepath.com/sources/ferrum-oor/"
  },
  {
   "name": "Fosi Audio SK02",
   "type": "desktop",
   "tier": "budget",
   "price_usd": 100,
   "power_mw_32_ohm": 190,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 40.5,
   "basis_150_ohm": "extrapolated",
   "power_mw_300_ohm": 20.3,
   "basis_300_ohm": "extrapolated",
   "power_mw_600_ohm": 10.1,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": "",
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "32ohm=190mW",
   "confidence": "medium",
   "source_url": "https://fosiaudio.com/products/fosi-audio-sk02-desktop-dac-headphone-amp",
   "page": "https://thephonepath.com/sources/fosi-audio-sk02/"
  },
  {
   "name": "Geshelli Archel 3S Pro",
   "type": "desktop",
   "tier": "midfi",
   "price_usd": 370,
   "power_mw_32_ohm": 1000,
   "basis_32_ohm": "extrapolated",
   "power_mw_150_ohm": 213,
   "basis_150_ohm": "extrapolated",
   "power_mw_300_ohm": 107,
   "basis_300_ohm": "extrapolated",
   "power_mw_600_ohm": 53.3,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": "",
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "16ohm=2000mW",
   "confidence": "medium",
   "source_url": "https://geshelli.com/product/archel-3s-pro/",
   "page": "https://thephonepath.com/sources/geshelli-archel-3s-pro/"
  },
  {
   "name": "Geshelli Archel Pro",
   "type": "desktop",
   "tier": "midfi",
   "price_usd": 200,
   "power_mw_32_ohm": 1800,
   "basis_32_ohm": "unverified",
   "power_mw_150_ohm": 500,
   "basis_150_ohm": "unverified",
   "power_mw_300_ohm": 250,
   "basis_300_ohm": "unverified",
   "power_mw_600_ohm": 125,
   "basis_600_ohm": "unverified",
   "output_impedance_ohm": 0.1,
   "output_noise_uv": 1.5,
   "rated_output": "",
   "published_points": "",
   "confidence": "legacy",
   "source_url": "",
   "page": "https://thephonepath.com/sources/geshelli-archel-pro/"
  },
  {
   "name": "Grace Design m900",
   "type": "desktop",
   "tier": "midfi",
   "price_usd": 660,
   "power_mw_32_ohm": 1020,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 228,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 115,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 57.0,
   "basis_600_ohm": "published",
   "output_impedance_ohm": 0.08,
   "output_noise_uv": 5.01,
   "rated_output": "se",
   "published_points": "16ohm=1900mW; 32ohm=1020mW; 50ohm=680mW; 300ohm=115mW; 600ohm=57mW",
   "confidence": "medium",
   "source_url": "https://gracedesign.com/products/monitor-controllers/m900/",
   "page": "https://thephonepath.com/sources/grace-design-m900/"
  },
  {
   "name": "Gustard H26",
   "type": "desktop",
   "tier": "highend",
   "price_usd": 1099,
   "power_mw_32_ohm": 9700,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 2069,
   "basis_150_ohm": "extrapolated",
   "power_mw_300_ohm": 1035,
   "basis_300_ohm": "extrapolated",
   "power_mw_600_ohm": 517,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 0.1,
   "output_noise_uv": "",
   "rated_output": "bal",
   "published_points": "32ohm=9700mW",
   "confidence": "medium",
   "source_url": "https://www.manualslib.com/manual/3686248/Gustard-H26.html",
   "page": "https://thephonepath.com/sources/gustard-h26/"
  },
  {
   "name": "Headamp GS-X Mini",
   "type": "desktop",
   "tier": "highend",
   "price_usd": 1795,
   "power_mw_32_ohm": 1276,
   "basis_32_ohm": "interpolated",
   "power_mw_150_ohm": 333,
   "basis_150_ohm": "extrapolated",
   "power_mw_300_ohm": 167,
   "basis_300_ohm": "extrapolated",
   "power_mw_600_ohm": 83.3,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 0.05,
   "output_noise_uv": 1.5,
   "rated_output": "se",
   "published_points": "25ohm=1500mW; 50ohm=1000mW; 100ohm=500mW",
   "confidence": "high",
   "source_url": "https://headamp.com/products/gs-x-mini",
   "page": "https://thephonepath.com/sources/headamp-gs-x-mini/"
  },
  {
   "name": "iFi iCAN Pro",
   "type": "desktop",
   "tier": "midfi",
   "price_usd": 600,
   "power_mw_32_ohm": 4000,
   "basis_32_ohm": "unverified",
   "power_mw_150_ohm": 1200,
   "basis_150_ohm": "unverified",
   "power_mw_300_ohm": 600,
   "basis_300_ohm": "unverified",
   "power_mw_600_ohm": 300,
   "basis_600_ohm": "unverified",
   "output_impedance_ohm": 0.5,
   "output_noise_uv": 25,
   "rated_output": "",
   "published_points": "",
   "confidence": "legacy",
   "source_url": "",
   "page": "https://thephonepath.com/sources/ifi-ican-pro/"
  },
  {
   "name": "iFi Pro iCAN Signature",
   "type": "desktop",
   "tier": "highend",
   "price_usd": 2499,
   "power_mw_32_ohm": 2400,
   "basis_32_ohm": "extrapolated",
   "power_mw_150_ohm": 512,
   "basis_150_ohm": "extrapolated",
   "power_mw_300_ohm": 256,
   "basis_300_ohm": "extrapolated",
   "power_mw_600_ohm": 128,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": "",
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "16ohm=4800mW",
   "confidence": "high",
   "source_url": "https://downloads.ifi-audio.com/wp-content/uploads/2021/09/Pro-iCAN-Signature-User-Manual_Ver1.0_ok.pdf",
   "page": "https://thephonepath.com/sources/ifi-pro-ican-signature/"
  },
  {
   "name": "iFi Zen CAN",
   "type": "desktop",
   "tier": "budget",
   "price_usd": 199,
   "power_mw_32_ohm": 1600,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 375,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 190,
   "basis_300_ohm": "interpolated",
   "power_mw_600_ohm": 98.0,
   "basis_600_ohm": "published",
   "output_impedance_ohm": 0.5,
   "output_noise_uv": 1.5,
   "rated_output": "se",
   "published_points": "32ohm=1600mW; 64ohm=870mW; 600ohm=98mW",
   "confidence": "high",
   "source_url": "https://downloads.ifi-audio.com/wp-content/uploads/2021/02/ZEN-CAN-User-Manual-Ver1.3-Ordinary-power-supply.pdf",
   "page": "https://thephonepath.com/sources/ifi-zen-can/"
  },
  {
   "name": "JDS Labs Atom Amp 2",
   "type": "desktop",
   "tier": "budget",
   "price_usd": 129,
   "power_mw_32_ohm": 2650,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 567,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 284,
   "basis_300_ohm": "interpolated",
   "power_mw_600_ohm": 143,
   "basis_600_ohm": "published",
   "output_impedance_ohm": 0.7,
   "output_noise_uv": 1.33,
   "rated_output": "se",
   "published_points": "32ohm=2650mW; 600ohm=143mW",
   "confidence": "high",
   "source_url": "https://jdslabs.com/product/atom-amp-2/",
   "page": "https://thephonepath.com/sources/jds-labs-atom-amp-2/"
  },
  {
   "name": "JDS Labs Atom+ (2nd gen)",
   "type": "desktop",
   "tier": "budget",
   "price_usd": 99,
   "power_mw_32_ohm": 1000,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 545,
   "basis_150_ohm": "published",
   "power_mw_300_ohm": 272,
   "basis_300_ohm": "interpolated",
   "power_mw_600_ohm": 136,
   "basis_600_ohm": "published",
   "output_impedance_ohm": 0.7,
   "output_noise_uv": 1.99,
   "rated_output": "se",
   "published_points": "32ohm=1000mW; 150ohm=545mW; 600ohm=136mW",
   "confidence": "high",
   "source_url": "https://jdslabs.com/product/atom-amp/",
   "page": "https://thephonepath.com/sources/jds-labs-atom-2nd-gen/"
  },
  {
   "name": "Lake People G103-S Mk II",
   "type": "desktop",
   "tier": "midfi",
   "price_usd": 350,
   "power_mw_32_ohm": 1000,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 804,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 580,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 340,
   "basis_600_ohm": "published",
   "output_impedance_ohm": 0.1,
   "output_noise_uv": 6.15,
   "rated_output": "se",
   "published_points": "32ohm=1000mW; 50ohm=1280mW; 100ohm=1050mW; 300ohm=580mW; 600ohm=340mW",
   "confidence": "medium",
   "source_url": "https://www.lake-people.de/media/pdf/bf/de/82/Lake_People_G103S_S_P_MKII_TechGuide_EN_2024_07.pdf",
   "page": "https://thephonepath.com/sources/lake-people-g103-s-mk-ii/"
  },
  {
   "name": "Lake People G111 Mk II",
   "type": "desktop",
   "tier": "midfi",
   "price_usd": 629,
   "power_mw_32_ohm": 1400,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 1375,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 1050,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 600,
   "basis_600_ohm": "published",
   "output_impedance_ohm": 0.125,
   "output_noise_uv": 6.9,
   "rated_output": "se",
   "published_points": "16ohm=770mW; 32ohm=1400mW; 50ohm=2050mW; 100ohm=1750mW; 300ohm=1050mW; 600ohm=600mW",
   "confidence": "medium",
   "source_url": "https://www.lake-people.de/media/pdf/1a/ab/e9/Lake_People_G111_MKII_TechGuide_EN_2024_07.pdf",
   "page": "https://thephonepath.com/sources/lake-people-g111-mk-ii/"
  },
  {
   "name": "Little Dot MK II",
   "type": "desktop",
   "tier": "budget",
   "price_usd": 176,
   "power_mw_32_ohm": 100.0,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 214,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 300,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 150,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": "",
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "32ohm=100mW; 120ohm=200mW; 300ohm=300mW",
   "confidence": "medium",
   "source_url": "https://apos.audio/products/little-dot-mk2",
   "page": "https://thephonepath.com/sources/little-dot-mk-ii/"
  },
  {
   "name": "Little Dot MK III SE",
   "type": "desktop",
   "tier": "midfi",
   "price_usd": 540,
   "power_mw_32_ohm": 2500,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 1466,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 800,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 400,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": "",
   "output_noise_uv": "",
   "rated_output": "bal",
   "published_points": "32ohm=2500mW; 120ohm=1800mW; 300ohm=800mW",
   "confidence": "medium",
   "source_url": "https://shenzhenaudio.com/products/little-dot-mk3-se-mkiii-se-ld-6n11-tube-transistor-balance-pure-class-a-amplifice",
   "page": "https://thephonepath.com/sources/little-dot-mk-iii-se/"
  },
  {
   "name": "PreSonus HP4",
   "type": "desktop",
   "tier": "budget",
   "price_usd": 150,
   "power_mw_32_ohm": 69.3,
   "basis_32_ohm": "extrapolated",
   "power_mw_150_ohm": 52.0,
   "basis_150_ohm": "extrapolated",
   "power_mw_300_ohm": 26.0,
   "basis_300_ohm": "extrapolated",
   "power_mw_600_ohm": 13.0,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": "",
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "60ohm=130mW",
   "confidence": "medium",
   "source_url": "https://www.presonus.com/products/hp4-4-channel-headphone-amplifiers",
   "page": "https://thephonepath.com/sources/presonus-hp4/"
  },
  {
   "name": "Rupert Neve RNHP",
   "type": "desktop",
   "tier": "midfi",
   "price_usd": 699,
   "power_mw_32_ohm": 262,
   "basis_32_ohm": "interpolated",
   "power_mw_150_ohm": 175,
   "basis_150_ohm": "published",
   "power_mw_300_ohm": 87.5,
   "basis_300_ohm": "extrapolated",
   "power_mw_600_ohm": 43.8,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 0.08,
   "output_noise_uv": 8.03,
   "rated_output": "se",
   "published_points": "16ohm=230mW; 44ohm=300mW; 150ohm=175mW",
   "confidence": "medium",
   "source_url": "https://rupertneve.com/products/rnhp",
   "page": "https://thephonepath.com/sources/rupert-neve-rnhp/"
  },
  {
   "name": "Schiit Asgard 3",
   "type": "desktop",
   "tier": "midfi",
   "price_usd": 279,
   "power_mw_32_ohm": 3500,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 972,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 600,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 300,
   "basis_600_ohm": "published",
   "output_impedance_ohm": 0.2,
   "output_noise_uv": 1.5,
   "rated_output": "se",
   "published_points": "16ohm=5000mW; 32ohm=3500mW; 50ohm=2500mW; 300ohm=600mW; 600ohm=300mW",
   "confidence": "high",
   "source_url": "https://dev.schiit.com/products/asgard",
   "page": "https://thephonepath.com/sources/schiit-asgard-3/"
  },
  {
   "name": "Schiit Jotunheim 2",
   "type": "desktop",
   "tier": "midfi",
   "price_usd": 399,
   "power_mw_32_ohm": 2000,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 496,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 330,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 165,
   "basis_600_ohm": "published",
   "output_impedance_ohm": 0.1,
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "32ohm=2000mW; 50ohm=1200mW; 300ohm=330mW; 600ohm=165mW",
   "confidence": "medium",
   "source_url": "https://www.duet.no/produkt/schiit-jotunheim-2/",
   "page": "https://thephonepath.com/sources/schiit-jotunheim-2/"
  },
  {
   "name": "Schiit Lyr+",
   "type": "desktop",
   "tier": "midfi",
   "price_usd": 449,
   "power_mw_32_ohm": 6000,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 1512,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 900,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 450,
   "basis_600_ohm": "published",
   "output_impedance_ohm": 0.4,
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "16ohm=9000mW; 32ohm=6000mW; 50ohm=4000mW; 300ohm=900mW; 600ohm=450mW",
   "confidence": "high",
   "source_url": "https://www.schiit.com/products/lyr",
   "page": "https://thephonepath.com/sources/schiit-lyr/"
  },
  {
   "name": "Schiit Magni Heresy",
   "type": "desktop",
   "tier": "budget",
   "price_usd": 99,
   "power_mw_32_ohm": 2400,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 641,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 410,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 215,
   "basis_600_ohm": "published",
   "output_impedance_ohm": 0.25,
   "output_noise_uv": 1.5,
   "rated_output": "se",
   "published_points": "16ohm=2800mW; 32ohm=2400mW; 50ohm=1600mW; 300ohm=410mW; 600ohm=215mW",
   "confidence": "medium",
   "source_url": "https://headphones.com/blogs/reviews/schiit-magni-3-magni-heresy-headphone-amplifier-review-comparison",
   "page": "https://thephonepath.com/sources/schiit-magni-heresy/"
  },
  {
   "name": "Schiit Magni Piety",
   "type": "desktop",
   "tier": "budget",
   "price_usd": 200,
   "power_mw_32_ohm": 1000,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 446,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 400,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 200,
   "basis_600_ohm": "published",
   "output_impedance_ohm": 0.6,
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "16ohm=1200mW; 32ohm=1000mW; 50ohm=800mW; 300ohm=400mW; 600ohm=200mW",
   "confidence": "medium",
   "source_url": "https://nitschsound.com/products/magni-piety",
   "page": "https://thephonepath.com/sources/schiit-magni-piety/"
  },
  {
   "name": "Schiit Magni Unity",
   "type": "desktop",
   "tier": "budget",
   "price_usd": 119,
   "power_mw_32_ohm": 2500,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 622,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 415,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 220,
   "basis_600_ohm": "published",
   "output_impedance_ohm": 0.1,
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "16ohm=3000mW; 32ohm=2500mW; 50ohm=1500mW; 300ohm=415mW; 600ohm=220mW",
   "confidence": "high",
   "source_url": "https://www.schiit.com/products/magni-unity",
   "page": "https://thephonepath.com/sources/schiit-magni-unity/"
  },
  {
   "name": "Schiit Magni+",
   "type": "desktop",
   "tier": "budget",
   "price_usd": 109,
   "power_mw_32_ohm": 2000,
   "basis_32_ohm": "unverified",
   "power_mw_150_ohm": 560,
   "basis_150_ohm": "unverified",
   "power_mw_300_ohm": 260,
   "basis_300_ohm": "unverified",
   "power_mw_600_ohm": 130,
   "basis_600_ohm": "unverified",
   "output_impedance_ohm": 0.2,
   "output_noise_uv": 1.5,
   "rated_output": "",
   "published_points": "",
   "confidence": "legacy",
   "source_url": "",
   "page": "https://thephonepath.com/sources/schiit-magni/"
  },
  {
   "name": "Schiit Midgard",
   "type": "desktop",
   "tier": "midfi",
   "price_usd": 219,
   "power_mw_32_ohm": 4800,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 1231,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 750,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 375,
   "basis_600_ohm": "published",
   "output_impedance_ohm": 0.1,
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "16ohm=5500mW; 32ohm=4800mW; 50ohm=3200mW; 300ohm=750mW; 600ohm=375mW",
   "confidence": "high",
   "source_url": "https://www.schiit.com/products/midgard",
   "page": "https://thephonepath.com/sources/schiit-midgard/"
  },
  {
   "name": "Schiit Mjolnir 3",
   "type": "desktop",
   "tier": "highend",
   "price_usd": 1199,
   "power_mw_32_ohm": 1000,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 488,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 500,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 250,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 0.13,
   "output_noise_uv": 25,
   "rated_output": "se",
   "published_points": "32ohm=1000mW; 300ohm=500mW",
   "confidence": "high",
   "source_url": "https://www.schiit.com/products/mjolnir-3",
   "page": "https://thephonepath.com/sources/schiit-mjolnir-3/"
  },
  {
   "name": "Schiit Ragnarok 2",
   "type": "desktop",
   "tier": "highend",
   "price_usd": 1499,
   "power_mw_32_ohm": 6000,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 1250,
   "basis_150_ohm": "extrapolated",
   "power_mw_300_ohm": 625,
   "basis_300_ohm": "extrapolated",
   "power_mw_600_ohm": 313,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 0.1,
   "output_noise_uv": 1.5,
   "rated_output": "se",
   "published_points": "32ohm=6000mW; 50ohm=3750mW",
   "confidence": "medium",
   "source_url": "https://www.schiit.com/news/news/ragnarok-2-nexus-integrated-introduced",
   "page": "https://thephonepath.com/sources/schiit-ragnarok-2/"
  },
  {
   "name": "Schiit Valhalla 2",
   "type": "desktop",
   "tier": "midfi",
   "price_usd": 349,
   "power_mw_32_ohm": 115,
   "basis_32_ohm": "extrapolated",
   "power_mw_150_ohm": 426,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 800,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 450,
   "basis_600_ohm": "published",
   "output_impedance_ohm": 14.0,
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "50ohm=180mW; 300ohm=800mW; 600ohm=450mW",
   "confidence": "medium",
   "source_url": "https://www.audiophonics.fr/en/desktop-headphone-amplifiers/schiit-valhalla-2-amplifier-tube-headphones-zero-feedback-p-8910.html",
   "page": "https://thephonepath.com/sources/schiit-valhalla-2/"
  },
  {
   "name": "Schiit Vali 2+",
   "type": "desktop",
   "tier": "budget",
   "price_usd": 149,
   "power_mw_32_ohm": 1500,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 496,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 400,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 200,
   "basis_600_ohm": "published",
   "output_impedance_ohm": 1.8,
   "output_noise_uv": 25,
   "rated_output": "se",
   "published_points": "32ohm=1500mW; 50ohm=1000mW; 300ohm=400mW; 600ohm=200mW",
   "confidence": "medium",
   "source_url": "http://stereophile.com/content/schiit-audio-vali-2-headphone-amplifier-specifications",
   "page": "https://thephonepath.com/sources/schiit-vali-2/"
  },
  {
   "name": "Singxer SA-1",
   "type": "desktop",
   "tier": "midfi",
   "price_usd": 699,
   "power_mw_32_ohm": 5500,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 1595,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 785,
   "basis_300_ohm": "interpolated",
   "power_mw_600_ohm": 380,
   "basis_600_ohm": "published",
   "output_impedance_ohm": 1.4,
   "output_noise_uv": 0.3,
   "rated_output": "bal",
   "published_points": "16ohm=10000mW; 32ohm=5500mW; 68ohm=3100mW; 120ohm=2000mW; 600ohm=380mW",
   "confidence": "medium",
   "source_url": "https://www.singxer.com/pd.jsp?id=82",
   "page": "https://thephonepath.com/sources/singxer-sa-1/"
  },
  {
   "name": "SMSL HO100",
   "type": "desktop",
   "tier": "budget",
   "price_usd": 160,
   "power_mw_32_ohm": 1500,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 354,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 200,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 100,
   "basis_600_ohm": "published",
   "output_impedance_ohm": 0,
   "output_noise_uv": 1.3,
   "rated_output": "bal",
   "published_points": "16ohm=3000mW; 32ohm=1500mW; 300ohm=200mW; 600ohm=100mW",
   "confidence": "medium",
   "source_url": "https://www.smsl-audio.com/portal/product/detail/id/790.html",
   "page": "https://thephonepath.com/sources/smsl-ho100/"
  },
  {
   "name": "SMSL HO200",
   "type": "desktop",
   "tier": "midfi",
   "price_usd": 399,
   "power_mw_32_ohm": 3000,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 640,
   "basis_150_ohm": "extrapolated",
   "power_mw_300_ohm": 320,
   "basis_300_ohm": "extrapolated",
   "power_mw_600_ohm": 160,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 0.0,
   "output_noise_uv": 1.0,
   "rated_output": "bal",
   "published_points": "16ohm=6000mW; 32ohm=3000mW",
   "confidence": "medium",
   "source_url": "https://www.smsl-audio.com/portal/product/detail/id/766.html",
   "page": "https://thephonepath.com/sources/smsl-ho200/"
  },
  {
   "name": "SMSL SH-9",
   "type": "desktop",
   "tier": "midfi",
   "price_usd": 289,
   "power_mw_32_ohm": 3000,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 741,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 440,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 220,
   "basis_600_ohm": "published",
   "output_impedance_ohm": 0.0,
   "output_noise_uv": 1.5,
   "rated_output": "bal",
   "published_points": "16ohm=6000mW; 32ohm=3000mW; 300ohm=440mW; 600ohm=220mW",
   "confidence": "medium",
   "source_url": "https://www.smsl-audio.com/portal/product/detail/id/730.html",
   "page": "https://thephonepath.com/sources/smsl-sh-9/"
  },
  {
   "name": "SMSL SP400",
   "type": "desktop",
   "tier": "midfi",
   "price_usd": 529,
   "power_mw_32_ohm": 3000,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 741,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 440,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 220,
   "basis_600_ohm": "published",
   "output_impedance_ohm": 0,
   "output_noise_uv": 1.9,
   "rated_output": "se",
   "published_points": "16ohm=6000mW; 32ohm=3000mW; 300ohm=440mW; 600ohm=220mW",
   "confidence": "low",
   "source_url": "https://www.audiophonics.fr/en/desktop-headphone-amplifiers/smsl-sp400-balanced-headphone-amplifier-thx-aaa-888-mqa-p-14913.html",
   "page": "https://thephonepath.com/sources/smsl-sp400/"
  },
  {
   "name": "SPL Phonitor se",
   "type": "desktop",
   "tier": "highend",
   "price_usd": 1600,
   "power_mw_32_ohm": 1000,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 3149,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 4167,
   "basis_300_ohm": "extrapolated",
   "power_mw_600_ohm": 2083,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 0.18,
   "output_noise_uv": 5.48,
   "rated_output": "se",
   "published_points": "32ohm=1000mW; 250ohm=5000mW",
   "confidence": "medium",
   "source_url": "https://spl.audio/en/spl-produkt/phonitor-se/",
   "page": "https://thephonepath.com/sources/spl-phonitor-se/"
  },
  {
   "name": "SPL Phonitor x",
   "type": "desktop",
   "tier": "highend",
   "price_usd": 3200,
   "power_mw_32_ohm": 1000,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 3149,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 4167,
   "basis_300_ohm": "extrapolated",
   "power_mw_600_ohm": 2083,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 0.18,
   "output_noise_uv": 5.48,
   "rated_output": "se",
   "published_points": "32ohm=1000mW; 250ohm=5000mW",
   "confidence": "medium",
   "source_url": "https://spl.audio/en/spl-produkt/phonitor-x/",
   "page": "https://thephonepath.com/sources/spl-phonitor-x/"
  },
  {
   "name": "SPL Phonitor xe",
   "type": "desktop",
   "tier": "highend",
   "price_usd": 3000,
   "power_mw_32_ohm": 2700,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 3651,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 4167,
   "basis_300_ohm": "extrapolated",
   "power_mw_600_ohm": 2083,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 0.18,
   "output_noise_uv": 5.48,
   "rated_output": "se",
   "published_points": "32ohm=2700mW; 250ohm=5000mW",
   "confidence": "medium",
   "source_url": "https://spl.audio/en/spl-produkt/phonitor-xe/",
   "page": "https://thephonepath.com/sources/spl-phonitor-xe/"
  },
  {
   "name": "Topping A30 Pro",
   "type": "desktop",
   "tier": "midfi",
   "price_usd": 249,
   "power_mw_32_ohm": 5500,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 1385,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 840,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 420,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 0.1,
   "output_noise_uv": 0.3,
   "rated_output": "bal",
   "published_points": "16ohm=6000mW; 32ohm=5500mW; 300ohm=840mW",
   "confidence": "medium",
   "source_url": "https://www.audiophonics.fr/en/desktop-headphone-amplifiers/topping-a30-pro-headphone-amplifier-nfca-black-p-15140.html",
   "page": "https://thephonepath.com/sources/topping-a30-pro/"
  },
  {
   "name": "Topping A90",
   "type": "desktop",
   "tier": "midfi",
   "price_usd": 499,
   "power_mw_32_ohm": 2000,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 427,
   "basis_150_ohm": "extrapolated",
   "power_mw_300_ohm": 213,
   "basis_300_ohm": "extrapolated",
   "power_mw_600_ohm": 107,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 0.1,
   "output_noise_uv": 0.2,
   "rated_output": "se",
   "published_points": "32ohm=2000mW",
   "confidence": "low",
   "source_url": "https://toppingaudio.com/products-list/headphone-amp",
   "page": "https://thephonepath.com/sources/topping-a90/"
  },
  {
   "name": "Topping A90 Discrete",
   "type": "desktop",
   "tier": "midfi",
   "price_usd": 599,
   "power_mw_32_ohm": 2000,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 480,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 250,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 125,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 0.1,
   "output_noise_uv": 0.2,
   "rated_output": "se",
   "published_points": "16ohm=3300mW; 32ohm=2000mW; 64ohm=1100mW; 300ohm=250mW",
   "confidence": "low",
   "source_url": "https://toppingaudio.com/product-item/a90-discrete",
   "page": "https://thephonepath.com/sources/topping-a90-discrete/"
  },
  {
   "name": "Topping L30 II",
   "type": "desktop",
   "tier": "budget",
   "price_usd": 149,
   "power_mw_32_ohm": 2700,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 946,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 560,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 280,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 0.1,
   "output_noise_uv": 0.3,
   "rated_output": "se",
   "published_points": "16ohm=3500mW; 32ohm=2700mW; 64ohm=2000mW; 300ohm=560mW",
   "confidence": "medium",
   "source_url": "https://www.toppingaudio.com/product-item/l30-ii",
   "page": "https://thephonepath.com/sources/topping-l30-ii/"
  },
  {
   "name": "Topping L50",
   "type": "desktop",
   "tier": "budget",
   "price_usd": 229,
   "power_mw_32_ohm": 2800,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 933,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 540,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 290,
   "basis_600_ohm": "published",
   "output_impedance_ohm": 0.1,
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "16ohm=3500mW; 32ohm=2800mW; 64ohm=2000mW; 300ohm=540mW; 600ohm=290mW",
   "confidence": "low",
   "source_url": "https://www.audiophonics.fr/en/desktop-headphone-amplifiers/topping-l50-balanced-headphone-amplifier-nfca-black-p-15586.html",
   "page": "https://thephonepath.com/sources/topping-l50/"
  },
  {
   "name": "Violectric V222",
   "type": "desktop",
   "tier": "highend",
   "price_usd": 1245,
   "power_mw_32_ohm": 2700,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 2730,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 1800,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 1100,
   "basis_600_ohm": "published",
   "output_impedance_ohm": 0.25,
   "output_noise_uv": 6.15,
   "rated_output": "se",
   "published_points": "16ohm=1600mW; 32ohm=2700mW; 50ohm=3400mW; 100ohm=3700mW; 300ohm=1800mW; 600ohm=1100mW",
   "confidence": "medium",
   "source_url": "https://www.violectric.de/media/pdf/ae/75/5b/Violectric_HPA_V222_TechGuide_EN_2022_10.pdf",
   "page": "https://thephonepath.com/sources/violectric-v222/"
  },
  {
   "name": "Violectric V550 Pro",
   "type": "desktop",
   "tier": "highend",
   "price_usd": 3600,
   "power_mw_32_ohm": 4700,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 2875,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 1450,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 740,
   "basis_600_ohm": "published",
   "output_impedance_ohm": 0.15,
   "output_noise_uv": 5.48,
   "rated_output": "se",
   "published_points": "16ohm=2000mW; 32ohm=4700mW; 50ohm=6400mW; 100ohm=4300mW; 300ohm=1450mW; 600ohm=740mW",
   "confidence": "medium",
   "source_url": "https://www.violectric.de/media/pdf/41/b2/78/Violectric_HPA_V550_TechGuide_EN_2022_12.pdf",
   "page": "https://thephonepath.com/sources/violectric-v550-pro/"
  },
  {
   "name": "Wells Audio Milo",
   "type": "desktop",
   "tier": "highend",
   "price_usd": 1700,
   "power_mw_32_ohm": 12000,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 3067,
   "basis_150_ohm": "extrapolated",
   "power_mw_300_ohm": 1533,
   "basis_300_ohm": "extrapolated",
   "power_mw_600_ohm": 767,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 0.1,
   "output_noise_uv": 1.5,
   "rated_output": "se",
   "published_points": "32ohm=12000mW; 46ohm=10000mW",
   "confidence": "medium",
   "source_url": "https://www.wellsaudio.com/milo",
   "page": "https://thephonepath.com/sources/wells-audio-milo/"
  },
  {
   "name": "Woo Audio WA6",
   "type": "desktop",
   "tier": "highend",
   "price_usd": 1099,
   "power_mw_32_ohm": 580,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 536,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 460,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 400,
   "basis_600_ohm": "published",
   "output_impedance_ohm": "",
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "32ohm=580mW; 60ohm=550mW; 120ohm=590mW; 300ohm=460mW; 600ohm=400mW",
   "confidence": "medium",
   "source_url": "https://wooaudio.com/amplifiers/wa6",
   "page": "https://thephonepath.com/sources/woo-audio-wa6/"
  },
  {
   "name": "xDuoo TA-30",
   "type": "desktop",
   "tier": "highend",
   "price_usd": 709,
   "power_mw_32_ohm": 3000,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 640,
   "basis_150_ohm": "extrapolated",
   "power_mw_300_ohm": 320,
   "basis_300_ohm": "extrapolated",
   "power_mw_600_ohm": 160,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": "",
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "32ohm=3000mW",
   "confidence": "medium",
   "source_url": "https://xduoo.net/product/ta-30",
   "page": "https://thephonepath.com/sources/xduoo-ta-30/"
  },
  {
   "name": "Apple USB-C dongle (EU)",
   "type": "dongle",
   "tier": "budget",
   "price_usd": 9,
   "power_mw_32_ohm": 15.0,
   "basis_32_ohm": "unverified",
   "power_mw_150_ohm": 4.0,
   "basis_150_ohm": "unverified",
   "power_mw_300_ohm": 2.0,
   "basis_300_ohm": "unverified",
   "power_mw_600_ohm": 1.0,
   "basis_600_ohm": "unverified",
   "output_impedance_ohm": 1,
   "output_noise_uv": 6,
   "rated_output": "",
   "published_points": "",
   "confidence": "legacy",
   "source_url": "",
   "page": "https://thephonepath.com/sources/apple-usb-c-dongle-eu/"
  },
  {
   "name": "Apple USB-C dongle (US)",
   "type": "dongle",
   "tier": "budget",
   "price_usd": 9,
   "power_mw_32_ohm": 30.0,
   "basis_32_ohm": "unverified",
   "power_mw_150_ohm": 8.0,
   "basis_150_ohm": "unverified",
   "power_mw_300_ohm": 4.0,
   "basis_300_ohm": "unverified",
   "power_mw_600_ohm": 2.0,
   "basis_600_ohm": "unverified",
   "output_impedance_ohm": 1,
   "output_noise_uv": 6,
   "rated_output": "",
   "published_points": "",
   "confidence": "legacy",
   "source_url": "",
   "page": "https://thephonepath.com/sources/apple-usb-c-dongle-us/"
  },
  {
   "name": "Astell&Kern HC3",
   "type": "dongle",
   "tier": "midfi",
   "price_usd": 179,
   "power_mw_32_ohm": 125,
   "basis_32_ohm": "voltage-bound",
   "power_mw_150_ohm": 26.7,
   "basis_150_ohm": "voltage-bound",
   "power_mw_300_ohm": 13.3,
   "basis_300_ohm": "voltage-bound",
   "power_mw_600_ohm": 6.7,
   "basis_600_ohm": "voltage-bound",
   "output_impedance_ohm": 2.0,
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "",
   "confidence": "high",
   "source_url": "https://astellnkern.co.uk/products/ak-hc3-dual-dac-cable",
   "page": "https://thephonepath.com/sources/astellandkern-hc3/"
  },
  {
   "name": "Astell&Kern HC4",
   "type": "dongle",
   "tier": "midfi",
   "price_usd": 219,
   "power_mw_32_ohm": 125,
   "basis_32_ohm": "voltage-bound",
   "power_mw_150_ohm": 26.7,
   "basis_150_ohm": "voltage-bound",
   "power_mw_300_ohm": 13.3,
   "basis_300_ohm": "voltage-bound",
   "power_mw_600_ohm": 6.7,
   "basis_600_ohm": "voltage-bound",
   "output_impedance_ohm": 0.9,
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "",
   "confidence": "high",
   "source_url": "https://astellnkern.co.uk/products/ak-hc4-dac-amp",
   "page": "https://thephonepath.com/sources/astellandkern-hc4/"
  },
  {
   "name": "Cayin RU7",
   "type": "dongle",
   "tier": "midfi",
   "price_usd": 269,
   "power_mw_32_ohm": 160,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 34.1,
   "basis_150_ohm": "extrapolated",
   "power_mw_300_ohm": 17.1,
   "basis_300_ohm": "extrapolated",
   "power_mw_600_ohm": 8.5,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": "",
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "32ohm=160mW",
   "confidence": "medium",
   "source_url": "https://en.cayin.cn/features/7/124/603.html",
   "page": "https://thephonepath.com/sources/cayin-ru7/"
  },
  {
   "name": "ddHiFi TC44 Pro",
   "type": "dongle",
   "tier": "midfi",
   "price_usd": 189,
   "power_mw_32_ohm": 120,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 25.6,
   "basis_150_ohm": "extrapolated",
   "power_mw_300_ohm": 12.8,
   "basis_300_ohm": "extrapolated",
   "power_mw_600_ohm": 6.4,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 0.4,
   "output_noise_uv": 2.5,
   "rated_output": "bal",
   "published_points": "32ohm=120mW",
   "confidence": "high",
   "source_url": "https://www.ddhifi.com/en/release/3899/",
   "page": "https://thephonepath.com/sources/ddhifi-tc44-pro/"
  },
  {
   "name": "ddHiFi TC44 Pro E2",
   "type": "dongle",
   "tier": "budget",
   "price_usd": 99,
   "power_mw_32_ohm": 250,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 53.3,
   "basis_150_ohm": "extrapolated",
   "power_mw_300_ohm": 26.7,
   "basis_300_ohm": "extrapolated",
   "power_mw_600_ohm": 13.3,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": "",
   "output_noise_uv": "",
   "rated_output": "bal",
   "published_points": "32ohm=250mW",
   "confidence": "high",
   "source_url": "https://www.ddhifi.com/en/product/tc44pro-e2/",
   "page": "https://thephonepath.com/sources/ddhifi-tc44-pro-e2/"
  },
  {
   "name": "FiiO KA11",
   "type": "dongle",
   "tier": "budget",
   "price_usd": 29,
   "power_mw_32_ohm": 200,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 43.3,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 22.0,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 11.0,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 0.7,
   "output_noise_uv": 1.7,
   "rated_output": "se",
   "published_points": "16ohm=245mW; 32ohm=200mW; 300ohm=22mW",
   "confidence": "medium",
   "source_url": "https://fiio-shop.de/EN/FiiO-KA11/HL02308.4",
   "page": "https://thephonepath.com/sources/fiio-ka11/"
  },
  {
   "name": "FiiO KA13",
   "type": "dongle",
   "tier": "budget",
   "price_usd": 79,
   "power_mw_32_ohm": 50.0,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 10.4,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 5.0,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 2.5,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 1.7,
   "output_noise_uv": 2.5,
   "rated_output": "se",
   "published_points": "16ohm=70mW; 32ohm=50mW; 300ohm=5mW",
   "confidence": "high",
   "source_url": "https://www.fiio.com/ka13_parameters",
   "page": "https://thephonepath.com/sources/fiio-ka13/"
  },
  {
   "name": "FiiO KA15",
   "type": "dongle",
   "tier": "budget",
   "price_usd": 109,
   "power_mw_32_ohm": 180,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 38.2,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 19.0,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 9.5,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 0.8,
   "output_noise_uv": 1.7,
   "rated_output": "se",
   "published_points": "16ohm=290mW; 32ohm=180mW; 300ohm=19mW",
   "confidence": "medium",
   "source_url": "https://www.fiio.com/KA15_parameters",
   "page": "https://thephonepath.com/sources/fiio-ka15/"
  },
  {
   "name": "FiiO KA17",
   "type": "dongle",
   "tier": "midfi",
   "price_usd": 149,
   "power_mw_32_ohm": 140,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 34.1,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 20.0,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 10.0,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 1.0,
   "output_noise_uv": 2.0,
   "rated_output": "se",
   "published_points": "16ohm=110mW; 32ohm=140mW; 300ohm=20mW",
   "confidence": "high",
   "source_url": "https://www.fiio.com/KA17_parameters",
   "page": "https://thephonepath.com/sources/fiio-ka17/"
  },
  {
   "name": "FiiO KA5",
   "type": "dongle",
   "tier": "budget",
   "price_usd": 99,
   "power_mw_32_ohm": 122,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 26.5,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 13.5,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 6.8,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 0.3,
   "output_noise_uv": 1.6,
   "rated_output": "se",
   "published_points": "16ohm=136mW; 32ohm=122mW; 300ohm=13.5mW",
   "confidence": "high",
   "source_url": "https://www.fiio.com/ka5_parameters",
   "page": "https://thephonepath.com/sources/fiio-ka5/"
  },
  {
   "name": "Generic CX31993 dongles",
   "type": "dongle",
   "tier": "budget",
   "price_usd": 12,
   "power_mw_32_ohm": 60.0,
   "basis_32_ohm": "unverified",
   "power_mw_150_ohm": 18.0,
   "basis_150_ohm": "unverified",
   "power_mw_300_ohm": 9.0,
   "basis_300_ohm": "unverified",
   "power_mw_600_ohm": 5.0,
   "basis_600_ohm": "unverified",
   "output_impedance_ohm": 1.5,
   "output_noise_uv": 8,
   "rated_output": "",
   "published_points": "",
   "confidence": "legacy",
   "source_url": "",
   "page": "https://thephonepath.com/sources/generic-cx31993-dongles/"
  },
  {
   "name": "Hidizs S9 Pro",
   "type": "dongle",
   "tier": "budget",
   "price_usd": 109,
   "power_mw_32_ohm": 100.0,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 21.3,
   "basis_150_ohm": "extrapolated",
   "power_mw_300_ohm": 10.7,
   "basis_300_ohm": "extrapolated",
   "power_mw_600_ohm": 5.3,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 0.3,
   "output_noise_uv": 4,
   "rated_output": "se",
   "published_points": "32ohm=100mW",
   "confidence": "high",
   "source_url": "https://www.hidizs.net/pages/hidizs-s9-pro-balanced-single-ended-mini-hifi-dac-amp-specifications",
   "page": "https://thephonepath.com/sources/hidizs-s9-pro/"
  },
  {
   "name": "Hidizs S9 Pro Plus",
   "type": "dongle",
   "tier": "budget",
   "price_usd": 139,
   "power_mw_32_ohm": 138,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 29.4,
   "basis_150_ohm": "extrapolated",
   "power_mw_300_ohm": 14.7,
   "basis_300_ohm": "extrapolated",
   "power_mw_600_ohm": 7.4,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": "",
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "32ohm=138mW",
   "confidence": "high",
   "source_url": "https://www.hidizs.net/products/hidizs-s9-pro-plus-martha-hifi-balanced-dongle-dac",
   "page": "https://thephonepath.com/sources/hidizs-s9-pro-plus/"
  },
  {
   "name": "iBasso DC-Elite",
   "type": "dongle",
   "tier": "highend",
   "price_usd": 449,
   "power_mw_32_ohm": 162,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 34.6,
   "basis_150_ohm": "extrapolated",
   "power_mw_300_ohm": 17.3,
   "basis_300_ohm": "extrapolated",
   "power_mw_600_ohm": 8.6,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": "",
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "32ohm=162mW",
   "confidence": "high",
   "source_url": "https://ibassousa.com/ibasso-dc-elite/",
   "page": "https://thephonepath.com/sources/ibasso-dc-elite/"
  },
  {
   "name": "iBasso DC03 Pro",
   "type": "dongle",
   "tier": "budget",
   "price_usd": 69,
   "power_mw_32_ohm": 98.0,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 20.9,
   "basis_150_ohm": "extrapolated",
   "power_mw_300_ohm": 10.5,
   "basis_300_ohm": "extrapolated",
   "power_mw_600_ohm": 5.2,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 0.12,
   "output_noise_uv": 0.9,
   "rated_output": "se",
   "published_points": "32ohm=98mW",
   "confidence": "high",
   "source_url": "https://ibassousa.com/ibasso-dc03pro/",
   "page": "https://thephonepath.com/sources/ibasso-dc03-pro/"
  },
  {
   "name": "iBasso DC04 Pro",
   "type": "dongle",
   "tier": "budget",
   "price_usd": 119,
   "power_mw_32_ohm": 125,
   "basis_32_ohm": "voltage-bound",
   "power_mw_150_ohm": 26.7,
   "basis_150_ohm": "voltage-bound",
   "power_mw_300_ohm": 13.3,
   "basis_300_ohm": "voltage-bound",
   "power_mw_600_ohm": 6.7,
   "basis_600_ohm": "voltage-bound",
   "output_impedance_ohm": 0.2,
   "output_noise_uv": 2.5,
   "rated_output": "se",
   "published_points": "",
   "confidence": "medium",
   "source_url": "https://ibasso.com/product/dc04pro/",
   "page": "https://thephonepath.com/sources/ibasso-dc04-pro/"
  },
  {
   "name": "JadeAudio JA11",
   "type": "dongle",
   "tier": "budget",
   "price_usd": 20,
   "power_mw_32_ohm": 30.0,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 6.4,
   "basis_150_ohm": "extrapolated",
   "power_mw_300_ohm": 3.2,
   "basis_300_ohm": "extrapolated",
   "power_mw_600_ohm": 1.6,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 0.5,
   "output_noise_uv": 1.7,
   "rated_output": "se",
   "published_points": "32ohm=30mW",
   "confidence": "medium",
   "source_url": "https://fiio-shop.de/EN/FiiO-JadeAudio-JA11/HL02390.1",
   "page": "https://thephonepath.com/sources/jadeaudio-ja11/"
  },
  {
   "name": "Moondrop Dawn Pro",
   "type": "dongle",
   "tier": "budget",
   "price_usd": 75,
   "power_mw_32_ohm": 125,
   "basis_32_ohm": "voltage-bound",
   "power_mw_150_ohm": 26.7,
   "basis_150_ohm": "voltage-bound",
   "power_mw_300_ohm": 13.3,
   "basis_300_ohm": "voltage-bound",
   "power_mw_600_ohm": 6.7,
   "basis_600_ohm": "voltage-bound",
   "output_impedance_ohm": 0.3,
   "output_noise_uv": 1.5,
   "rated_output": "se",
   "published_points": "",
   "confidence": "high",
   "source_url": "https://moondroplab.com/en/products/dawn-pro",
   "page": "https://thephonepath.com/sources/moondrop-dawn-pro/"
  },
  {
   "name": "Moondrop Moonriver 2 Ti",
   "type": "dongle",
   "tier": "midfi",
   "price_usd": 190,
   "power_mw_32_ohm": 280,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 78.5,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 53.0,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 26.5,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": "",
   "output_noise_uv": 1.5,
   "rated_output": "bal",
   "published_points": "32ohm=280mW; 300ohm=53mW",
   "confidence": "high",
   "source_url": "https://moondroplab.com/en/products/moonriver2-ti",
   "page": "https://thephonepath.com/sources/moondrop-moonriver-2-ti/"
  },
  {
   "name": "Qudelix T71",
   "type": "dongle",
   "tier": "midfi",
   "price_usd": 229,
   "power_mw_32_ohm": 500,
   "basis_32_ohm": "voltage-bound",
   "power_mw_150_ohm": 107,
   "basis_150_ohm": "voltage-bound",
   "power_mw_300_ohm": 53.3,
   "basis_300_ohm": "voltage-bound",
   "power_mw_600_ohm": 26.7,
   "basis_600_ohm": "voltage-bound",
   "output_impedance_ohm": 0.3,
   "output_noise_uv": 2.5,
   "rated_output": "se",
   "published_points": "",
   "confidence": "high",
   "source_url": "https://www.qudelix.com/products/copy-of-qudelix-t71-usb-dac",
   "page": "https://thephonepath.com/sources/qudelix-t71/"
  },
  {
   "name": "Questyle M15",
   "type": "dongle",
   "tier": "midfi",
   "price_usd": 250,
   "power_mw_32_ohm": 300,
   "basis_32_ohm": "unverified",
   "power_mw_150_ohm": 110,
   "basis_150_ohm": "unverified",
   "power_mw_300_ohm": 55.0,
   "basis_300_ohm": "unverified",
   "power_mw_600_ohm": 28.0,
   "basis_600_ohm": "unverified",
   "output_impedance_ohm": 0.5,
   "output_noise_uv": 3,
   "rated_output": "",
   "published_points": "",
   "confidence": "legacy",
   "source_url": "",
   "page": "https://thephonepath.com/sources/questyle-m15/"
  },
  {
   "name": "Shanling UA5",
   "type": "dongle",
   "tier": "midfi",
   "price_usd": 259,
   "power_mw_32_ohm": 137,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 29.2,
   "basis_150_ohm": "extrapolated",
   "power_mw_300_ohm": 14.6,
   "basis_300_ohm": "extrapolated",
   "power_mw_600_ohm": 7.3,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 0.8,
   "output_noise_uv": 3.5,
   "rated_output": "se",
   "published_points": "32ohm=137mW",
   "confidence": "high",
   "source_url": "https://device.report/manual/8855535",
   "page": "https://thephonepath.com/sources/shanling-ua5/"
  },
  {
   "name": "Tanchjim Space",
   "type": "dongle",
   "tier": "budget",
   "price_usd": 70,
   "power_mw_32_ohm": 125,
   "basis_32_ohm": "voltage-bound",
   "power_mw_150_ohm": 26.7,
   "basis_150_ohm": "voltage-bound",
   "power_mw_300_ohm": 13.3,
   "basis_300_ohm": "voltage-bound",
   "power_mw_600_ohm": 6.7,
   "basis_600_ohm": "voltage-bound",
   "output_impedance_ohm": "",
   "output_noise_uv": 1.1,
   "rated_output": "se",
   "published_points": "",
   "confidence": "high",
   "source_url": "https://tanchjim.com/en/products/dac/space/",
   "page": "https://thephonepath.com/sources/tanchjim-space/"
  },
  {
   "name": "Tempotec Sonata BHD Pro",
   "type": "dongle",
   "tier": "budget",
   "price_usd": 60,
   "power_mw_32_ohm": 280,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 59.7,
   "basis_150_ohm": "extrapolated",
   "power_mw_300_ohm": 29.9,
   "basis_300_ohm": "extrapolated",
   "power_mw_600_ohm": 14.9,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 0.6,
   "output_noise_uv": 4,
   "rated_output": "bal",
   "published_points": "32ohm=280mW",
   "confidence": "high",
   "source_url": "https://www.tempotec.net/products/sonata-bhd-pro-usb-dac",
   "page": "https://thephonepath.com/sources/tempotec-sonata-bhd-pro/"
  },
  {
   "name": "Truthear SHIO",
   "type": "dongle",
   "tier": "budget",
   "price_usd": 70,
   "power_mw_32_ohm": 125,
   "basis_32_ohm": "voltage-bound",
   "power_mw_150_ohm": 26.7,
   "basis_150_ohm": "voltage-bound",
   "power_mw_300_ohm": 13.3,
   "basis_300_ohm": "voltage-bound",
   "power_mw_600_ohm": 6.7,
   "basis_600_ohm": "voltage-bound",
   "output_impedance_ohm": 0.3,
   "output_noise_uv": 1.6,
   "rated_output": "se",
   "published_points": "",
   "confidence": "medium",
   "source_url": "https://truthear.com/products/shio",
   "page": "https://thephonepath.com/sources/truthear-shio/"
  },
  {
   "name": "Apogee BOOM",
   "type": "interface",
   "tier": "midfi",
   "price_usd": 299,
   "power_mw_32_ohm": 240,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 51.2,
   "basis_150_ohm": "extrapolated",
   "power_mw_300_ohm": 25.6,
   "basis_300_ohm": "extrapolated",
   "power_mw_600_ohm": 12.8,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 0.5,
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "32ohm=240mW",
   "confidence": "medium",
   "source_url": "https://apogeedigital.com/product/boom/",
   "page": "https://thephonepath.com/sources/apogee-boom/"
  },
  {
   "name": "Apogee Duet 3",
   "type": "interface",
   "tier": "midfi",
   "price_usd": 649,
   "power_mw_32_ohm": 1183,
   "basis_32_ohm": "voltage-bound",
   "power_mw_150_ohm": 252,
   "basis_150_ohm": "voltage-bound",
   "power_mw_300_ohm": 126,
   "basis_300_ohm": "voltage-bound",
   "power_mw_600_ohm": 63.1,
   "basis_600_ohm": "voltage-bound",
   "output_impedance_ohm": 0.5,
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "",
   "confidence": "medium",
   "source_url": "https://apogeedigital.com/product/apogee-duet-3/",
   "page": "https://thephonepath.com/sources/apogee-duet-3/"
  },
  {
   "name": "Apogee Symphony Desktop",
   "type": "interface",
   "tier": "highend",
   "price_usd": 1495,
   "power_mw_32_ohm": 490,
   "basis_32_ohm": "interpolated",
   "power_mw_150_ohm": 145,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 103,
   "basis_300_ohm": "interpolated",
   "power_mw_600_ohm": 90.0,
   "basis_600_ohm": "published",
   "output_impedance_ohm": "",
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "30ohm=520mW; 600ohm=90mW",
   "confidence": "medium",
   "source_url": "https://apogeedigital.com/product/symphony-desktop/",
   "page": "https://thephonepath.com/sources/apogee-symphony-desktop/"
  },
  {
   "name": "Arturia AudioFuse Rev2",
   "type": "interface",
   "tier": "midfi",
   "price_usd": 599,
   "power_mw_32_ohm": 187,
   "basis_32_ohm": "voltage-bound",
   "power_mw_150_ohm": 40.0,
   "basis_150_ohm": "voltage-bound",
   "power_mw_300_ohm": 20.0,
   "basis_300_ohm": "voltage-bound",
   "power_mw_600_ohm": 10.0,
   "basis_600_ohm": "voltage-bound",
   "output_impedance_ohm": 33,
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "",
   "confidence": "medium",
   "source_url": "https://www.arturia.com/products/audio/audiofuse/details",
   "page": "https://thephonepath.com/sources/arturia-audiofuse-rev2/"
  },
  {
   "name": "Arturia MiniFuse 2",
   "type": "interface",
   "tier": "budget",
   "price_usd": 149,
   "power_mw_32_ohm": 139,
   "basis_32_ohm": "source-impedance",
   "power_mw_150_ohm": 45.0,
   "basis_150_ohm": "source-impedance",
   "power_mw_300_ohm": 24.0,
   "basis_300_ohm": "source-impedance",
   "power_mw_600_ohm": 12.4,
   "basis_600_ohm": "source-impedance",
   "output_impedance_ohm": 10,
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "33ohm=137mW",
   "confidence": "medium",
   "source_url": "https://dl.arturia.net/products/minifuse-2/manual/minifuse-2_Manual_1_0_0_EN.pdf",
   "page": "https://thephonepath.com/sources/arturia-minifuse-2/"
  },
  {
   "name": "Audient EVO 4",
   "type": "interface",
   "tier": "budget",
   "price_usd": 129,
   "power_mw_32_ohm": 22.5,
   "basis_32_ohm": "interpolated",
   "power_mw_150_ohm": 14.3,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 10.8,
   "basis_300_ohm": "interpolated",
   "power_mw_600_ohm": 10.3,
   "basis_600_ohm": "published",
   "output_impedance_ohm": 50,
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "30ohm=22.4mW; 60ohm=26.4mW; 600ohm=10.3mW",
   "confidence": "medium",
   "source_url": "https://audient.com/products/audio-interfaces/evo-4/tech-specs/",
   "page": "https://thephonepath.com/sources/audient-evo-4/"
  },
  {
   "name": "Audient EVO 8",
   "type": "interface",
   "tier": "midfi",
   "price_usd": 249,
   "power_mw_32_ohm": 22.5,
   "basis_32_ohm": "interpolated",
   "power_mw_150_ohm": 14.3,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 10.8,
   "basis_300_ohm": "interpolated",
   "power_mw_600_ohm": 10.3,
   "basis_600_ohm": "published",
   "output_impedance_ohm": 50,
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "30ohm=22.4mW; 60ohm=26.4mW; 600ohm=10.3mW",
   "confidence": "medium",
   "source_url": "https://audient.com/products/audio-interfaces/evo-8/tech-specs/",
   "page": "https://thephonepath.com/sources/audient-evo-8/"
  },
  {
   "name": "Audient iD14 MkII",
   "type": "interface",
   "tier": "midfi",
   "price_usd": 349,
   "power_mw_32_ohm": 112,
   "basis_32_ohm": "interpolated",
   "power_mw_150_ohm": 75.3,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 55.0,
   "basis_300_ohm": "interpolated",
   "power_mw_600_ohm": 49.7,
   "basis_600_ohm": "published",
   "output_impedance_ohm": "",
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "30ohm=111.3mW; 62ohm=140.4mW; 600ohm=49.7mW",
   "confidence": "medium",
   "source_url": "https://support.audient.com/hc/en-us/articles/360054621132-iD14-MKII-Technical-Specifications",
   "page": "https://thephonepath.com/sources/audient-id14-mkii/"
  },
  {
   "name": "Audient iD24",
   "type": "interface",
   "tier": "midfi",
   "price_usd": 599,
   "power_mw_32_ohm": 118,
   "basis_32_ohm": "interpolated",
   "power_mw_150_ohm": 77.6,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 57.0,
   "basis_300_ohm": "interpolated",
   "power_mw_600_ohm": 52.0,
   "basis_600_ohm": "published",
   "output_impedance_ohm": 50,
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "30ohm=116.2mW; 60ohm=147.7mW; 600ohm=52mW",
   "confidence": "medium",
   "source_url": "https://support.audient.com/hc/en-us/articles/12847886517396-iD24-Technical-Specifications",
   "page": "https://thephonepath.com/sources/audient-id24/"
  },
  {
   "name": "Audient iD4 MkII",
   "type": "interface",
   "tier": "budget",
   "price_usd": 199,
   "power_mw_32_ohm": 112,
   "basis_32_ohm": "interpolated",
   "power_mw_150_ohm": 75.3,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 55.0,
   "basis_300_ohm": "interpolated",
   "power_mw_600_ohm": 49.7,
   "basis_600_ohm": "published",
   "output_impedance_ohm": "",
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "30ohm=111.3mW; 62ohm=140.4mW; 600ohm=49.7mW",
   "confidence": "medium",
   "source_url": "https://support.audient.com/hc/en-us/articles/360055048851-iD4-MKII-Technical-Specifications",
   "page": "https://thephonepath.com/sources/audient-id4-mkii/"
  },
  {
   "name": "Focusrite Scarlett 18i20 4th gen",
   "type": "interface",
   "tier": "midfi",
   "price_usd": 699,
   "power_mw_32_ohm": 55.3,
   "basis_32_ohm": "extrapolated",
   "power_mw_150_ohm": 27.1,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 27.0,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 13.5,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 11,
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "33ohm=57mW; 300ohm=27mW",
   "confidence": "medium",
   "source_url": "https://userguides.focusrite.com/hc/en-gb/articles/21616107507218-18i20-4th-Gen-Specifications",
   "page": "https://thephonepath.com/sources/focusrite-scarlett-18i20-4th-gen/"
  },
  {
   "name": "Focusrite Scarlett 2i2 4th gen",
   "type": "interface",
   "tier": "budget",
   "price_usd": 199,
   "power_mw_32_ohm": 31.0,
   "basis_32_ohm": "extrapolated",
   "power_mw_150_ohm": 19.3,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 22.0,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 11.0,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 50,
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "33ohm=32mW; 300ohm=22mW",
   "confidence": "medium",
   "source_url": "https://userguides.focusrite.com/hc/en-gb/articles/19640392541202-Scarlett-2i2-Specifications",
   "page": "https://thephonepath.com/sources/focusrite-scarlett-2i2-4th-gen/"
  },
  {
   "name": "Focusrite Scarlett 4i4 4th gen",
   "type": "interface",
   "tier": "midfi",
   "price_usd": 279,
   "power_mw_32_ohm": 55.3,
   "basis_32_ohm": "extrapolated",
   "power_mw_150_ohm": 27.1,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 27.0,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 13.5,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 11,
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "33ohm=57mW; 300ohm=27mW",
   "confidence": "medium",
   "source_url": "https://userguides.focusrite.com/hc/en-gb/articles/18676425695890-Scarlett-4i4-Specifications",
   "page": "https://thephonepath.com/sources/focusrite-scarlett-4i4-4th-gen/"
  },
  {
   "name": "Focusrite Scarlett Solo 4th gen",
   "type": "interface",
   "tier": "budget",
   "price_usd": 139,
   "power_mw_32_ohm": 31.0,
   "basis_32_ohm": "extrapolated",
   "power_mw_150_ohm": 19.3,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 22.0,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 11.0,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 50,
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "33ohm=32mW; 300ohm=22mW",
   "confidence": "medium",
   "source_url": "https://userguides.focusrite.com/hc/en-gb/articles/17505454908562-Solo-4th-Gen-Specifications",
   "page": "https://thephonepath.com/sources/focusrite-scarlett-solo-4th-gen/"
  },
  {
   "name": "Lynx Aurora(n)",
   "type": "interface",
   "tier": "highend",
   "price_usd": 3499,
   "power_mw_32_ohm": 1297,
   "basis_32_ohm": "voltage-bound",
   "power_mw_150_ohm": 277,
   "basis_150_ohm": "voltage-bound",
   "power_mw_300_ohm": 138,
   "basis_300_ohm": "voltage-bound",
   "power_mw_600_ohm": 69.2,
   "basis_600_ohm": "voltage-bound",
   "output_impedance_ohm": "",
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "",
   "confidence": "medium",
   "source_url": "https://www.lynxstudio.com/downloads/aurora-n/auroran-specifications/",
   "page": "https://thephonepath.com/sources/lynx-aurora-n/"
  },
  {
   "name": "Merging Anubis",
   "type": "interface",
   "tier": "highend",
   "price_usd": 2790,
   "power_mw_32_ohm": 961,
   "basis_32_ohm": "voltage-bound",
   "power_mw_150_ohm": 205,
   "basis_150_ohm": "voltage-bound",
   "power_mw_300_ohm": 103,
   "basis_300_ohm": "voltage-bound",
   "power_mw_600_ohm": 51.3,
   "basis_600_ohm": "voltage-bound",
   "output_impedance_ohm": 0.035,
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "",
   "confidence": "medium",
   "source_url": "https://www.merging.com/uploads/assets/Merging_pdfs/Brochures/Neumann/Technical_Sheet_Merging_Anubis_and_Missions_V1.pdf",
   "page": "https://thephonepath.com/sources/merging-anubis/"
  },
  {
   "name": "MOTU M2",
   "type": "interface",
   "tier": "midfi",
   "price_usd": 219,
   "power_mw_32_ohm": 333,
   "basis_32_ohm": "voltage-bound",
   "power_mw_150_ohm": 71.1,
   "basis_150_ohm": "voltage-bound",
   "power_mw_300_ohm": 35.6,
   "basis_300_ohm": "voltage-bound",
   "power_mw_600_ohm": 17.8,
   "basis_600_ohm": "voltage-bound",
   "output_impedance_ohm": "",
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "",
   "confidence": "medium",
   "source_url": "https://cdn-data.motu.com/manuals/usb-c-audio/M_Series_User_Guide.pdf",
   "page": "https://thephonepath.com/sources/motu-m2/"
  },
  {
   "name": "MOTU M4",
   "type": "interface",
   "tier": "midfi",
   "price_usd": 279,
   "power_mw_32_ohm": 333,
   "basis_32_ohm": "voltage-bound",
   "power_mw_150_ohm": 71.1,
   "basis_150_ohm": "voltage-bound",
   "power_mw_300_ohm": 35.6,
   "basis_300_ohm": "voltage-bound",
   "power_mw_600_ohm": 17.8,
   "basis_600_ohm": "voltage-bound",
   "output_impedance_ohm": "",
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "",
   "confidence": "medium",
   "source_url": "https://cdn-data.motu.com/manuals/usb-c-audio/M_Series_User_Guide.pdf",
   "page": "https://thephonepath.com/sources/motu-m4/"
  },
  {
   "name": "MOTU M6",
   "type": "interface",
   "tier": "midfi",
   "price_usd": 499,
   "power_mw_32_ohm": 333,
   "basis_32_ohm": "voltage-bound",
   "power_mw_150_ohm": 71.1,
   "basis_150_ohm": "voltage-bound",
   "power_mw_300_ohm": 35.6,
   "basis_300_ohm": "voltage-bound",
   "power_mw_600_ohm": 17.8,
   "basis_600_ohm": "voltage-bound",
   "output_impedance_ohm": "",
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "",
   "confidence": "medium",
   "source_url": "https://cdn-data.motu.com/manuals/usb-c-audio/M_Series_User_Guide.pdf",
   "page": "https://thephonepath.com/sources/motu-m6/"
  },
  {
   "name": "MOTU UltraLite-mk5",
   "type": "interface",
   "tier": "midfi",
   "price_usd": 699,
   "power_mw_32_ohm": 471,
   "basis_32_ohm": "voltage-bound",
   "power_mw_150_ohm": 100,
   "basis_150_ohm": "voltage-bound",
   "power_mw_300_ohm": 50.2,
   "basis_300_ohm": "voltage-bound",
   "power_mw_600_ohm": 25.1,
   "basis_600_ohm": "voltage-bound",
   "output_impedance_ohm": 1,
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "",
   "confidence": "medium",
   "source_url": "https://motu.com/en-us/products/gen5/ultralite-mk5/specs/",
   "page": "https://thephonepath.com/sources/motu-ultralite-mk5/"
  },
  {
   "name": "PreSonus Quantum ES 2",
   "type": "interface",
   "tier": "budget",
   "price_usd": 199,
   "power_mw_32_ohm": 106,
   "basis_32_ohm": "voltage-bound",
   "power_mw_150_ohm": 22.5,
   "basis_150_ohm": "voltage-bound",
   "power_mw_300_ohm": 11.2,
   "basis_300_ohm": "voltage-bound",
   "power_mw_600_ohm": 5.6,
   "basis_600_ohm": "voltage-bound",
   "output_impedance_ohm": "",
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "",
   "confidence": "medium",
   "source_url": "https://www.presonus.com/products/quantum-es-2-usb-c-audio-interface",
   "page": "https://thephonepath.com/sources/presonus-quantum-es-2/"
  },
  {
   "name": "PreSonus Studio 24c",
   "type": "interface",
   "tier": "budget",
   "price_usd": 149,
   "power_mw_32_ohm": 26.9,
   "basis_32_ohm": "extrapolated",
   "power_mw_150_ohm": 17.5,
   "basis_150_ohm": "extrapolated",
   "power_mw_300_ohm": 8.8,
   "basis_300_ohm": "extrapolated",
   "power_mw_600_ohm": 4.4,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": "",
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "56ohm=47mW",
   "confidence": "medium",
   "source_url": "https://www.presonus.com/products/Studio-24c/tech-specs",
   "page": "https://thephonepath.com/sources/presonus-studio-24c/"
  },
  {
   "name": "PreSonus Studio 68c",
   "type": "interface",
   "tier": "midfi",
   "price_usd": 299,
   "power_mw_32_ohm": 85.7,
   "basis_32_ohm": "extrapolated",
   "power_mw_150_ohm": 56.0,
   "basis_150_ohm": "extrapolated",
   "power_mw_300_ohm": 28.0,
   "basis_300_ohm": "extrapolated",
   "power_mw_600_ohm": 14.0,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": "",
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "56ohm=150mW",
   "confidence": "medium",
   "source_url": "https://www.presonus.com/products/Studio-68c/tech-specs",
   "page": "https://thephonepath.com/sources/presonus-studio-68c/"
  },
  {
   "name": "RME ADI-2 DAC FS",
   "type": "interface",
   "tier": "highend",
   "price_usd": 1399,
   "power_mw_32_ohm": 1200,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 256,
   "basis_150_ohm": "extrapolated",
   "power_mw_300_ohm": 128,
   "basis_300_ohm": "extrapolated",
   "power_mw_600_ohm": 64.0,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 0.1,
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "16ohm=940mW; 32ohm=1200mW",
   "confidence": "medium",
   "source_url": "https://rme-audio.de/adi-2-dac.html",
   "page": "https://thephonepath.com/sources/rme-adi-2-dac-fs/"
  },
  {
   "name": "RME ADI-2 Pro FS R",
   "type": "interface",
   "tier": "highend",
   "price_usd": 2199,
   "power_mw_32_ohm": 2971,
   "basis_32_ohm": "voltage-bound",
   "power_mw_150_ohm": 634,
   "basis_150_ohm": "voltage-bound",
   "power_mw_300_ohm": 317,
   "basis_300_ohm": "voltage-bound",
   "power_mw_600_ohm": 158,
   "basis_600_ohm": "voltage-bound",
   "output_impedance_ohm": 0.1,
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "",
   "confidence": "medium",
   "source_url": "https://rme-audio.de/adi-2-pro-fs-be.html",
   "page": "https://thephonepath.com/sources/rme-adi-2-pro-fs-r/"
  },
  {
   "name": "RME Babyface Pro FS",
   "type": "interface",
   "tier": "midfi",
   "price_usd": 899,
   "power_mw_32_ohm": 374,
   "basis_32_ohm": "voltage-bound",
   "power_mw_150_ohm": 79.8,
   "basis_150_ohm": "voltage-bound",
   "power_mw_300_ohm": 39.9,
   "basis_300_ohm": "voltage-bound",
   "power_mw_600_ohm": 20.0,
   "basis_600_ohm": "voltage-bound",
   "output_impedance_ohm": 10,
   "output_noise_uv": 6.3,
   "rated_output": "se",
   "published_points": "",
   "confidence": "medium",
   "source_url": "https://rme-audio.de/babyface-pro-fs.html",
   "page": "https://thephonepath.com/sources/rme-babyface-pro-fs/"
  },
  {
   "name": "RME Fireface UCX II",
   "type": "interface",
   "tier": "highend",
   "price_usd": 1749,
   "power_mw_32_ohm": 210,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 44.8,
   "basis_150_ohm": "extrapolated",
   "power_mw_300_ohm": 22.4,
   "basis_300_ohm": "extrapolated",
   "power_mw_600_ohm": 11.2,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 1,
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "32ohm=210mW",
   "confidence": "medium",
   "source_url": "https://rme-audio.de/fireface-ucx-ii.html",
   "page": "https://thephonepath.com/sources/rme-fireface-ucx-ii/"
  },
  {
   "name": "SSL 12",
   "type": "interface",
   "tier": "midfi",
   "price_usd": 599,
   "power_mw_32_ohm": 1183,
   "basis_32_ohm": "voltage-bound",
   "power_mw_150_ohm": 252,
   "basis_150_ohm": "voltage-bound",
   "power_mw_300_ohm": 126,
   "basis_300_ohm": "voltage-bound",
   "power_mw_600_ohm": 63.1,
   "basis_600_ohm": "voltage-bound",
   "output_impedance_ohm": 1,
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "",
   "confidence": "medium",
   "source_url": "https://support.solidstatelogic.com/hc/en-gb/articles/5568765809309-SSL-12-User-Guide",
   "page": "https://thephonepath.com/sources/ssl-12/"
  },
  {
   "name": "SSL 2 MkII",
   "type": "interface",
   "tier": "midfi",
   "price_usd": 229,
   "power_mw_32_ohm": 374,
   "basis_32_ohm": "voltage-bound",
   "power_mw_150_ohm": 79.8,
   "basis_150_ohm": "voltage-bound",
   "power_mw_300_ohm": 39.9,
   "basis_300_ohm": "voltage-bound",
   "power_mw_600_ohm": 20.0,
   "basis_600_ohm": "voltage-bound",
   "output_impedance_ohm": 1,
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "",
   "confidence": "medium",
   "source_url": "https://support.solidstatelogic.com/hc/en-gb/articles/20859917333789-SSL-2-MKII-User-Guide",
   "page": "https://thephonepath.com/sources/ssl-2-mkii/"
  },
  {
   "name": "SSL 2 Plus MkII",
   "type": "interface",
   "tier": "midfi",
   "price_usd": 299,
   "power_mw_32_ohm": 374,
   "basis_32_ohm": "voltage-bound",
   "power_mw_150_ohm": 79.8,
   "basis_150_ohm": "voltage-bound",
   "power_mw_300_ohm": 39.9,
   "basis_300_ohm": "voltage-bound",
   "power_mw_600_ohm": 20.0,
   "basis_600_ohm": "voltage-bound",
   "output_impedance_ohm": 1,
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "",
   "confidence": "medium",
   "source_url": "https://support.solidstatelogic.com/hc/en-gb/articles/20859917333789-SSL-2-MKII-User-Guide",
   "page": "https://thephonepath.com/sources/ssl-2-plus-mkii/"
  },
  {
   "name": "Steinberg IXO22",
   "type": "interface",
   "tier": "budget",
   "price_usd": 119,
   "power_mw_32_ohm": 32.0,
   "basis_32_ohm": "extrapolated",
   "power_mw_150_ohm": 10.7,
   "basis_150_ohm": "extrapolated",
   "power_mw_300_ohm": 5.3,
   "basis_300_ohm": "extrapolated",
   "power_mw_600_ohm": 2.7,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": "",
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "40ohm=40mW",
   "confidence": "medium",
   "source_url": "https://download.steinberg.net/downloads_hardware/IXO/Manuals/IXO22_IXO12_Operation_Manual/IXO22_IXO12_Operation_Manual_English.pdf",
   "page": "https://thephonepath.com/sources/steinberg-ixo22/"
  },
  {
   "name": "Steinberg UR22C",
   "type": "interface",
   "tier": "budget",
   "price_usd": 199,
   "power_mw_32_ohm": 12.0,
   "basis_32_ohm": "extrapolated",
   "power_mw_150_ohm": 4.0,
   "basis_150_ohm": "extrapolated",
   "power_mw_300_ohm": 2.0,
   "basis_300_ohm": "extrapolated",
   "power_mw_600_ohm": 1.0,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": "",
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "40ohm=15mW",
   "confidence": "medium",
   "source_url": "https://download.steinberg.net/downloads_hardware/UR-C/Manuals/UR22C_Operation_Manual_English.pdf",
   "page": "https://thephonepath.com/sources/steinberg-ur22c/"
  },
  {
   "name": "Steinberg UR44C",
   "type": "interface",
   "tier": "midfi",
   "price_usd": 349,
   "power_mw_32_ohm": 80.0,
   "basis_32_ohm": "extrapolated",
   "power_mw_150_ohm": 26.7,
   "basis_150_ohm": "extrapolated",
   "power_mw_300_ohm": 13.3,
   "basis_300_ohm": "extrapolated",
   "power_mw_600_ohm": 6.7,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": "",
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "40ohm=100mW",
   "confidence": "medium",
   "source_url": "https://download.steinberg.net/downloads_hardware/UR-C/Manuals/UR44C_Operation_Manual_English.pdf",
   "page": "https://thephonepath.com/sources/steinberg-ur44c/"
  },
  {
   "name": "Universal Audio Volt 2",
   "type": "interface",
   "tier": "budget",
   "price_usd": 199,
   "power_mw_32_ohm": 84.0,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 28.0,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 22.0,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 12.0,
   "basis_600_ohm": "published",
   "output_impedance_ohm": "",
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "32ohm=84mW; 300ohm=22mW; 600ohm=12mW",
   "confidence": "medium",
   "source_url": "https://help.uaudio.com/hc/en-us/articles/4409522227092-Volt-Specifications",
   "page": "https://thephonepath.com/sources/universal-audio-volt-2/"
  },
  {
   "name": "Universal Audio Volt 276",
   "type": "interface",
   "tier": "midfi",
   "price_usd": 299,
   "power_mw_32_ohm": 84.0,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 28.0,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 22.0,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 12.0,
   "basis_600_ohm": "published",
   "output_impedance_ohm": "",
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "32ohm=84mW; 300ohm=22mW; 600ohm=12mW",
   "confidence": "medium",
   "source_url": "https://help.uaudio.com/hc/en-us/articles/4409522227092-Volt-Specifications",
   "page": "https://thephonepath.com/sources/universal-audio-volt-276/"
  },
  {
   "name": "Zoom UAC-232",
   "type": "interface",
   "tier": "midfi",
   "price_usd": 399,
   "power_mw_32_ohm": 148,
   "basis_32_ohm": "source-impedance",
   "power_mw_150_ohm": 51.0,
   "basis_150_ohm": "source-impedance",
   "power_mw_300_ohm": 27.5,
   "basis_300_ohm": "source-impedance",
   "power_mw_600_ohm": 14.3,
   "basis_600_ohm": "source-impedance",
   "output_impedance_ohm": 12,
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "63ohm=100mW",
   "confidence": "medium",
   "source_url": "https://zoomcorp.com/media/documents/E_UAC-232_.pdf",
   "page": "https://thephonepath.com/sources/zoom-uac-232/"
  },
  {
   "name": "FiiO Q7",
   "type": "portable",
   "tier": "highend",
   "price_usd": 750,
   "power_mw_32_ohm": 550,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 123,
   "basis_150_ohm": "interpolated",
   "power_mw_300_ohm": 65.0,
   "basis_300_ohm": "published",
   "power_mw_600_ohm": 32.5,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 1.2,
   "output_noise_uv": 2.8,
   "rated_output": "se",
   "published_points": "16ohm=750mW; 32ohm=550mW; 300ohm=65mW",
   "confidence": "medium",
   "source_url": "https://www.fiio.com/q7_parameters",
   "page": "https://thephonepath.com/sources/fiio-q7/"
  },
  {
   "name": "iFi hip-dac 3",
   "type": "portable",
   "tier": "budget",
   "price_usd": 199,
   "power_mw_32_ohm": 280,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 59.7,
   "basis_150_ohm": "extrapolated",
   "power_mw_300_ohm": 29.9,
   "basis_300_ohm": "extrapolated",
   "power_mw_600_ohm": 14.9,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": 1,
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "32ohm=280mW",
   "confidence": "high",
   "source_url": "https://downloads.ifi-audio.com/wp-content/uploads/2023/10/hip-dac3-User-Manual_Ver0.15_ok.pdf",
   "page": "https://thephonepath.com/sources/ifi-hip-dac-3/"
  },
  {
   "name": "xDuoo XD05 Bal",
   "type": "portable",
   "tier": "midfi",
   "price_usd": 499,
   "power_mw_32_ohm": 1000,
   "basis_32_ohm": "published",
   "power_mw_150_ohm": 213,
   "basis_150_ohm": "extrapolated",
   "power_mw_300_ohm": 107,
   "basis_300_ohm": "extrapolated",
   "power_mw_600_ohm": 53.3,
   "basis_600_ohm": "extrapolated",
   "output_impedance_ohm": "",
   "output_noise_uv": "",
   "rated_output": "se",
   "published_points": "32ohm=1000mW",
   "confidence": "low",
   "source_url": "http://www.xduoo.com/product/xd05-bal/",
   "page": "https://thephonepath.com/sources/xduoo-xd05-bal/"
  }
 ]
}