A page here exists only where the answer is not the same for every product in the category. If every USB dongle in this database drove a headphone, satisfied the one-eighth rule on it and stayed quiet with it, the page would be one sentence long and it is not written.
That rule leaves 253 pages across 63 headphones. Each one answers three separate questions — loud enough, output impedance, hiss — and says how many products in the category could not be placed on each because their makers never published the figure.
64 Audio U12t
USB dongles · Bluetooth receivers · portable players · desktop amplifiers · desktop DAC/amps · audio interfaces
Abyss AB-1266 Phi TC
USB dongles · portable players · desktop amplifiers · desktop DAC/amps · audio interfaces
AKG K371
portable players · desktop amplifiers · desktop DAC/amps · audio interfaces
AKG K612 Pro
USB dongles · portable players · desktop amplifiers · audio interfaces
AKG K702
desktop amplifiers · desktop DAC/amps · audio interfaces
Audeze LCD-2 Classic
desktop amplifiers · desktop DAC/amps · audio interfaces
Audeze LCD-5
USB dongles · portable players · desktop amplifiers · desktop DAC/amps · audio interfaces
Audeze LCD-X 2021
portable players · desktop amplifiers · desktop DAC/amps · audio interfaces
Audeze MM-500
portable players · desktop amplifiers · desktop DAC/amps · audio interfaces
Audio-Technica ATH-M40X
portable players · desktop amplifiers · desktop DAC/amps · audio interfaces
Audio-Technica ATH-M50X
desktop amplifiers · desktop DAC/amps · audio interfaces
Audio-Technica ATH-R70X
USB dongles · portable players · desktop amplifiers · audio interfaces
Beyerdynamic DT 1990 Pro (250Ω)
desktop amplifiers · audio interfaces
Beyerdynamic DT 770 Pro (250Ω)
USB dongles · portable players · desktop amplifiers · audio interfaces
Beyerdynamic DT 770 Pro (80Ω)
desktop amplifiers · desktop DAC/amps · audio interfaces
Beyerdynamic DT 880 Edition (600Ω)
USB dongles · Bluetooth receivers · portable players · desktop amplifiers · audio interfaces
Beyerdynamic DT 900 Pro X
desktop amplifiers · desktop DAC/amps · audio interfaces
Beyerdynamic DT 990 Pro (250Ω)
USB dongles · portable players · desktop amplifiers · audio interfaces
Campfire Audio Andromeda 2020
USB dongles · Bluetooth receivers · portable players · portable amplifiers · desktop amplifiers · desktop DAC/amps · audio interfaces
Dan Clark Audio AEON 2 Closed
USB dongles · portable players · desktop amplifiers · desktop DAC/amps · audio interfaces
Dan Clark Audio Expanse
portable players · desktop amplifiers · desktop DAC/amps · audio interfaces
Dan Clark Audio Stealth
portable players · desktop amplifiers · desktop DAC/amps · audio interfaces
Etymotic ER2SE
USB dongles · portable players · desktop amplifiers · desktop DAC/amps · audio interfaces
Etymotic ER4XR
desktop amplifiers · desktop DAC/amps · audio interfaces
Focal Clear MG
desktop amplifiers · desktop DAC/amps · audio interfaces
Focal Utopia
desktop amplifiers · desktop DAC/amps · audio interfaces
Fostex T50RP MK3
desktop amplifiers · desktop DAC/amps · audio interfaces
Grado SR80x
desktop amplifiers · desktop DAC/amps · audio interfaces
HiFiMAN Ananda Nano
USB dongles · portable players · desktop amplifiers · desktop DAC/amps · audio interfaces
HiFiMAN Arya Organic
portable players · desktop amplifiers · desktop DAC/amps · audio interfaces
HiFiMAN Arya Stealth
portable players · desktop amplifiers · desktop DAC/amps · audio interfaces
HiFiMAN Edition XS
portable players · desktop amplifiers · desktop DAC/amps · audio interfaces
HiFiMAN Edition XV
USB dongles · portable players · desktop amplifiers · desktop DAC/amps · audio interfaces
HiFiMAN HE400se
portable players · desktop amplifiers · desktop DAC/amps · audio interfaces
HiFiMAN Sundara
portable players · desktop amplifiers · desktop DAC/amps · audio interfaces
HiFiMAN Susvara
USB dongles · Bluetooth receivers · portable players · desktop amplifiers · desktop DAC/amps · audio interfaces
Letshuoer S12 Pro
portable players · desktop amplifiers · desktop DAC/amps · audio interfaces
Meze 109 Pro
Bluetooth receivers · portable players · desktop amplifiers · desktop DAC/amps · audio interfaces
Meze 99 Classics
portable players · desktop amplifiers · desktop DAC/amps · audio interfaces
Meze Empyrean
portable players · desktop amplifiers · desktop DAC/amps · audio interfaces
Moondrop Aria
Bluetooth receivers · portable players · desktop amplifiers · desktop DAC/amps · audio interfaces
Moondrop Blessing 3
USB dongles · portable players · desktop amplifiers · desktop DAC/amps · audio interfaces
Moondrop Variations
USB dongles · portable players · desktop amplifiers · desktop DAC/amps · audio interfaces
Philips SHP9500
portable players · desktop amplifiers · desktop DAC/amps · audio interfaces
Philips SHP9600
portable players · desktop amplifiers · desktop DAC/amps · audio interfaces
Sennheiser HD 560S
desktop amplifiers · audio interfaces
Sennheiser HD 600
USB dongles · Bluetooth receivers · portable players · desktop amplifiers · desktop DAC/amps · audio interfaces
Sennheiser HD 650
desktop amplifiers · audio interfaces
Sennheiser HD 660S2
desktop amplifiers · audio interfaces
Sennheiser HD 6XX (Drop)
desktop amplifiers · audio interfaces
Sennheiser HD 800
USB dongles · portable players · desktop amplifiers · audio interfaces
Sennheiser HD 800S
USB dongles · portable players · desktop amplifiers · audio interfaces
Sennheiser IE 200
portable players · desktop amplifiers · desktop DAC/amps · audio interfaces
Sennheiser IE 600
portable players · desktop amplifiers · desktop DAC/amps · audio interfaces
Shure SE215
Bluetooth receivers · portable players · desktop amplifiers · desktop DAC/amps · audio interfaces
Shure SE846
USB dongles · Bluetooth receivers · portable players · portable amplifiers · desktop amplifiers · desktop DAC/amps · audio interfaces
Sony MDR-7506
desktop amplifiers · desktop DAC/amps · audio interfaces
Sony MDR-MV1
portable players · desktop amplifiers · desktop DAC/amps · audio interfaces
Thieaudio Monarch MK3
portable players · desktop amplifiers · desktop DAC/amps · audio interfaces
Truthear Hexa
portable players · desktop amplifiers · desktop DAC/amps · audio interfaces
Truthear Zero:RED
portable players · desktop amplifiers · desktop DAC/amps · audio interfaces
ZMF Atrium
USB dongles · portable players · desktop amplifiers · audio interfaces
ZMF Verite Closed
desktop amplifiers · audio interfaces