Steinberg UR22C: power output and what it will drive

The Steinberg UR22C is an audio interface at $199. It delivers 12 mW into 32Ω and 2.0 mW into 300Ω, which ranks it 280 of 280 for raw power among the sources in this database.

Measured at 100 dB SPL it has comfortable headroom on 275 of the 567 dynamic and planar headphones catalogued here, enough but not generous on 177, only marginal on 60 and not enough power for 55. Power is published at 40Ω; the rest of the table is derived from those figures. Output impedance is not published. Output noise is not published, so the hiss estimate cannot be run.

What it actually puts out

TypeAudio interface
Price$199
Power into 32 Ω12 mW
Power into 150 Ω4.0 mW
Power into 300 Ω2.0 mW
Power into 600 Ω1.0 mW
Output impedancenot published
Output noisenot published
Comfortable headroom on 275 of 567 headphones (49%) · short of power on 55

Where these numbers come from

The manufacturer publishes 15 mW into 40Ω. The rest of the table is worked out from those.

Derived rows hold output voltage steady, as an amplifier does (method).

Source: download.steinberg.net.

LoadPowerStatusHow it was arrived at
32 Ω12 mWDerivedbeyond the published loads, holding output voltage constant — which understates rather than flatters
40 Ω15 mWPublishedthe manufacturer publishes this figure at this exact load
150 Ω4.0 mWDerivedbeyond the published loads, holding output voltage constant — which understates rather than flatters
300 Ω2.0 mWDerivedbeyond the published loads, holding output voltage constant — which understates rather than flatters
600 Ω1.0 mWDerivedbeyond the published loads, holding output voltage constant — which understates rather than flatters

Against 40 well-known headphones

Easiest to hardest to drive, with headroom at a 100 dB SPL peak.

HeadphoneImpedanceSensitivityNeedsHeadroomVerdict
Shure SE8469 Ω114.0 dB/mW0.04 mW+19 dBComfortable
64 Audio U12t12.6 Ω108.0 dB/mW0.16 mW+15 dBComfortable
Shure SE21517 Ω107.0 dB/mW0.20 mW+15 dBComfortable
Moondrop Aria32 Ω107.1 dB/mW0.19 mW+18 dBComfortable
Audeze LCD-X 202120 Ω103.0 dB/mW0.50 mW+12 dBComfortable
Truthear Hexa20.5 Ω103.1 dB/mW0.49 mW+12 dBComfortable
Sennheiser IE 20018 Ω101.6 dB/mW0.69 mW+10 dBEnough
Sony MDR-750663 Ω106.0 dB/mW0.25 mW+16 dBComfortable
Meze 99 Classics32 Ω103.0 dB/mW0.50 mW+14 dBComfortable
Focal Clear MG55 Ω104.0 dB/mW0.40 mW+14 dBComfortable
Philips SHP950032 Ω101.0 dB0.79 mW+12 dBComfortable
Focal Utopia80 Ω104.0 dB/mW0.40 mW+13 dBComfortable
Meze Empyrean32 Ω100.0 dB1.0 mW+11 dBComfortable
Campfire Audio Andromeda 20209 Ω94.0 dB4.0 mW-1 dBNot enough
Etymotic ER2SE15 Ω96.0 dB/mW2.5 mW+4 dBEnough
AKG K37132 Ω99.1 dB/mW1.2 mW+10 dBEnough
Audio-Technica ATH-M50X38 Ω99.0 dB/mW1.3 mW+11 dBComfortable
Beyerdynamic DT 900 Pro X48 Ω100.0 dB/mW1.0 mW+11 dBComfortable
Audeze LCD-2 Classic70 Ω101.0 dB/mW0.79 mW+10 dBComfortable
Grado SR80x38 Ω98.0 dB/mW1.6 mW+10 dBEnough
Sennheiser HD 560S120 Ω100.8 dB/mW0.83 mW+8 dBEnough
HiFiMAN Edition XS18 Ω92.0 dB6.3 mW+0 dBMarginal
HiFiMAN Arya Stealth32 Ω94.0 dB4.0 mW+5 dBEnough
Dan Clark Audio AEON 2 Closed13 Ω90.0 dB/mW10 mW-3 dBNot enough
Audeze LCD-514 Ω90.0 dB/mW10 mW-3 dBNot enough
Beyerdynamic DT 1990 Pro (250Ω)250 Ω102.0 dB/mW0.63 mW+6 dBEnough
HiFiMAN HE400se25 Ω91.0 dB7.9 mW+1 dBMarginal
HiFiMAN Sundara32 Ω92.0 dB6.3 mW+3 dBMarginal
Dan Clark Audio Stealth23 Ω90.0 dB/mW10 mW-1 dBNot enough
Fostex T50RP MK350 Ω92.0 dB/mW6.3 mW+3 dBMarginal
AKG K70262 Ω92.9 dB/mW5.1 mW+3 dBMarginal
ZMF Verite Closed300 Ω99.0 dB/mW1.3 mW+2 dBMarginal
Sennheiser HD 650300 Ω97.8 dB/mW1.7 mW+1 dBMarginal
Sennheiser HD 800S300 Ω96.8 dB/mW2.1 mW-0 dBNot enough
Beyerdynamic DT 770 Pro (250Ω)250 Ω96.0 dB2.5 mW-0 dBNot enough
Audio-Technica ATH-R70X470 Ω98.0 dB/mW1.6 mW-1 dBNot enough
ZMF Atrium300 Ω96.0 dB/mW2.5 mW-1 dBNot enough
Abyss AB-1266 Phi TC50 Ω88.0 dB/mW16 mW-1 dBNot enough
Sennheiser HD 600300 Ω91.8 dB/mW6.6 mW-5 dBNot enough
HiFiMAN Susvara60 Ω83.0 dB50 mW-7 dBNot enough

Will it hiss?

The manufacturer does not publish an output noise figure for this source, so there is no hiss estimate here. If you have a measured figure, the hiss calculator takes it.

Output impedance and the one-eighth rule

The manufacturer does not publish an output impedance for this source. Without it, nothing here can say how this source will behave with a multi-driver in-ear.

With a measured figure, the checker works out the consequence.

The cheapest thing here that does the same job

SourceTypePriceInto 300 ΩOutput impedanceOutput noise
Apple USB-C dongle (US)USB dongle$94.0 mW1 Ω unverified6 µV unverified
Generic CX31993 donglesUSB dongle$129.0 mW1.5 Ω unverified8 µV unverified
JadeAudio JA11USB dongle$203.2 mW0.5 Ω1.7 µV

Of the 280 sources here, 82 do everything the Steinberg UR22C does as a headphone output: reach 100 dB on every headphone it reaches. The cheapest of them is the Apple USB-C dongle (US) at $9, against this one’s $199 — $190 less, and a USB dongle rather than an audio interface.

This counts the headphone output only; inputs, converters, the volume control and the build are outside it.

Other audio interfaces at a similar price

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