Woo Audio WA 22 Headphone Amplifier (Playback 43)

Equipment report
Headphone amps and amp/DACs
Woo Audio WA 22 Headphone Amplifier
Woo Audio WA 22 Headphone Amplifier (Playback 43)

Bottom Line

This quality of more realistic mid-range contrast was one I observed with the WA22 across many, but not all, of the headphones I tried. So while my reactions to the WA22 were extremely favorable, I must in fairness say “your mileage may vary,” because you may not be using any of the headphones I tried, and because the ‘phones you choose might conceivably behave differently than the test ‘phones I used. I should also add that once you settle on a specific set of headphones, there could be other amplifiers that address specific performance issues with your headphones better than the Woo does. But if you are looking for an amp that will make most of the headphones you try shine, I can and do highly recommend Woo Audio’s WA22.

Specs & Pricing

Woo Audio WA22 Headphone Amplifier
Power output: 810 mw with 6080, 2 watts with 7236 power tubes
Frequency response: 8 Hz - 50 KHz, -3dB
Ideal headphone impedance: 8-600 Ohms
Amplifier Input impedance: 100k Ohms
Analog Inputs: One single-ended stereo pair (via RCA jack), one balanced stereo pair (via 3-pin XLR jacks), with single-ended/balanced input selector switch
Analog Outputs: three balanced headphone outputs (one stereo output via 1/4" phone jack, one stereo output via a single 4-pin XLR jack, one via a separate left/right pair of 3-pin XLR jacks), hi/lo gain selector switch
Signal/Noise ratio: 92 dB
Distortion (THD): <= 0.3%
Dimensions (H x W x D): 7” x 12” x 10.5”
Weight: 25 pounds
Price: $1900 (standard model); Power Tube upgrade (matched pair, Sylvania 7236), + $120; Driver Tube upgrade (matched pair, Shuguang CV181-Z/6SN7GT), + $280; Rectifier Tube replacement (Sophia Princess Mesh Plate 274B), + $150

Associated Equipment
Esoteric DV-60 universal player (in PCM>DSD mode), Shunyata Python power cables, Nordost Blue Heaven interconnects, Sennheiser HD 800 headphones, Sennheiser HD 650 headphones, Denon AH-D5000 headphones, Ultrasone Edition 8 headphones, Grado PS 1000 headphones, Grado SR-325is headphones, Grado SR-225i headphones, Bose QC1 headphones, Luxman P200 headphone amplifier, PS Audio GCHA headphone amplifier, Headroom Head-Direct HA-1 amplifier

Woo Audio
Fax: (718) 764-6393