The NiceHCK F1 Pro is 16Ω at 104.0 dB/mW; the NiceHCK Himalaya is 22Ω at 110.0 dB/mW. This page covers what they ask of an amplifier, not how they sound.
The F1 Pro needs 6.0 dB more than the Himalaya to reach the same loudness — 0.40 mW against 0.10 mW.
| Specification | F1 Pro | Himalaya |
|---|---|---|
| Impedance | 16 Ω | 22 Ω |
| Sensitivity | 104.0 dB/mW | 110.0 dB/mW |
| Sensitivity (voltage) | 122.0 dB/V | 126.6 dB/V |
| Power for 100 dB | 0.40 mW | 0.10 mW |
| Voltage for 100 dB | 80 mV | 47 mV |
| Current for 100 dB | 5.0 mA | 2.1 mA |
| Highest source impedance that leaves them alone (one-eighth rule) | 2.00 Ω | 2.75 Ω |
| Sources that reach 100 dB out of 280 | 280 | 280 |
Every source in the database that drives one of them drives the other. On power, the choice between these two changes nothing about what amplifier you need.
14 sources stay below the audible-hiss threshold with the F1 Pro but cross it with the Himalaya (FiiO K11 R2R, Lake People G103-S Mk II, Schiit Valhalla 3, 11 more).
280 of the 280 sources here reach 100 dB on both.
The F1 Pro is more demanding than 26% of the 567 non-electrostatic models in this database; the Himalaya than 10%.
| dB SPL | F1 Pro power | F1 Pro voltage | Himalaya power | Himalaya voltage |
|---|---|---|---|---|
| 80 | 4.0 µW | 8 mV | 1.0 µW | 5 mV |
| 85 | 0.01 mW | 14 mV | 3.2 µW | 8 mV |
| 90 | 0.04 mW | 25 mV | 0.01 mW | 15 mV |
| 95 | 0.13 mW | 45 mV | 0.03 mW | 26 mV |
| 100 | 0.40 mW | 80 mV | 0.10 mW | 47 mV |
| 105 | 1.3 mW | 0.14 V | 0.32 mW | 83 mV |
| Source | Price | Headroom, F1 Pro | Headroom, Himalaya | Output impedance | Noise |
|---|---|---|---|---|---|
| JadeAudio JA11 | $20 | 15.8 dB | 23.1 dB | 0.5 Ω | 1.7 µV |
| FiiO KA11 | $29 | 27.9 dB | 33.4 dB | 0.7 Ω | 1.7 µV |
| FiiO BTR13 | $59 | 24.8 dB | 30.3 dB | 0.6 Ω | 1.0 µV |
Of the 280 sources here, 280 reach 100 dB on both. 55 of them also publish an output impedance low enough for both under the one-eighth rule and a noise figure that stays below the audible-hiss threshold with both.
The cheapest of the 55 is the JadeAudio JA11, at $20. It leaves 15.8 dB of headroom on the F1 Pro and 23.1 dB on the Himalaya, its output impedance is 0.5 Ω against a one-eighth limit of 2.00 Ω and 2.75 Ω, and its noise figure puts the hiss floor 13 dB and 9 dB below the 20 dB SPL this site treats as the point where a quiet room stops hiding it.
| Model | As printed | Tolerance | Standard |
|---|---|---|---|
| F1 Pro | 20Hz-28kHz | not printed | not printed |
| Himalaya | 20 Hz – 28 kHz | not printed | not printed |
Concept Kart, a retailer lists 20Hz-28kHz for the F1 Pro. NiceHCK prints 20 Hz – 28 kHz for the Himalaya. That figure stands on Concept Kart, a retailer, not on a document published by the maker.
Neither range has a tolerance printed beside it, so a wider range on one sheet is not deeper bass or more treble.
Not a measurement; maker by maker.
Both have a page of their own. In full: NiceHCK F1 Pro and NiceHCK Himalaya. Each figure on this page is labelled on those pages with where it came from, including the ones NiceHCK never published — what that maker publishes, counted.