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WA22 (2nd gen) Balanced Headphone Amplifier/Preamplifier

Woo Audio WA22 2nd gen amplifier
Woo Audio WA22 2nd gen amplifier

WA22 (2nd gen) Balanced Headphone Amplifier/Preamplifier

  • New edition offered on March 18, 2018
  • Preorder, Ships in 2–3 weeks
  • Add 3% for international orders


Originally introduced in 2009, WA22 has been an audiophile favorite. New for 2018 is improved sonic performance and preamplifier feature for use with a Hi-Fi system. WA22 (2nd gen) is an all-tube design, fully balanced headphone amplifier and preamplifier. The advantage of a fully balanced system is improved channel separation, more precise soundstage, and imaging. Perfectly suited for the headphone enthusiast and experienced audiophiles seeking flexibility and purest sound.

  • Updated to 2nd generation in April 2018
  • Tubes: 6SN7 driver x 2, 6080 power x 2, 5U4G rectifier x 1
  • Polytetrafluoroethylene (PTFE) tube sockets
  • Fully-balanced design, Class-A
  • Transformer-coupled, Point-to-Point wiring, Pseudo-dual power supply
  • Phase Splitter for use with unbalanced components 
  • HI / LO impedance setting
  • XLR input x 1, RCA input x 1
  • Dual 3-pin XLR (left and right channel), 4-pin XLR and 1/4" (6.3mm) stereo headphone outputs
  • XLR balanced PREAMP output (<50 ohms)
  • ALPS smooth potentiometer
  • Anodized aluminum chassis, available in black or silver
  • Self-biasing with compatible tubes [chart]
  • Global voltage (100v–220v) without converter
  • Dimensions: 7"(H), 12"(W), 10½"(D) amplifier 25 lbs.


 *Specifications and appearance are subject to change for improvement without notice.

*Specifications and appearance are subject to change for improvement without notice.

  • Quick start guide
  • WA22 (2nd gen) headphone amplifier/preamplifier x 1
  • 6080 vacuum tube x 2
  • 6SN7 vacuum tube x 2
  • 5U4G vacuum tube x 1

*AC power cord and audio cables are not included

In the box


Rectifier Tube Upgrade 1

Takatsuki TA-274B Tube (In Each)

Rectifier Tube Upgrade 2

Power Tube Upgrade

Driver Tube Upgrade

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