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[Refurbished] WA22 (1st gen) Fully-balanced Headphone Amplifier


[Refurbished] WA22 (1st gen) Fully-balanced Headphone Amplifier

1,199.00 1,999.00
  • Refurbished, new stock tubes, 1-yr. warranty

  • Limited time, FREE shipping worldwide

    Have questions? Contact us.


Comments and Reviews


The Woo Audio WA22 is a Class A headphone amplifier designed for audiophiles and music lovers who seek the ultimate in sound reproduction, without compromise. The WA22 offers the superior build quality and esthetics that audiophiles have come to expect from Woo Audio products. Its simple and elegant lines are the perfect complement to any home or office décor. Moreover, from its tube-based circuitry to its anodized aluminum case, the WA22 is designed and hand-built entirely by Woo craftman.

The WA22 offers a fully balanced mode of operation. It thereby provides exceptionally pure sound. The WA22 allows the user to switch between balanced or single-ended mode, depending on the source. Thus, it is fully compatible with balanced components equipped with XLR connectors, and conventional equipment that uses standard RCA connectors.

As is true of Woo Audio's whole range of headphone amplifiers, the WA22 uses vacuum tubes, and has no solid-state components. Wiring is mostly point-to-point. For those who wish to further customize the sound of the WA22 to their own sonic preferences. Woo Audio offers sets of alternative vacuum tubes in matched pairs.

The WA22 supports a wide range of headphones, from eight to 600 Ohms. This makes it the perfect match for a wide range of high-quality headphones.

The WA22 has gained critical acclaim for its transparent and detailed sound, with solid, well-defined bass. Tonal balance is superb, with no hint of treble harshness. Soundstage and stereo imaging is very defined, and focused. Classical recordings come to life with a finely layered sound stage. You are able to hear each individual section of the symphony in its proper location.

Listening to rock recordings is a revelation The WA22 has the speed and attack necessary to make rock recordings come to life. The thunderous bass, and drummers hitting the skins with speed and accuracy make for an exciting listening experience. The WA22 reference quality sound has musicality, and makes all recordings come to life with uncompromised performance.

Pictures shown are for illustration purpose only. Not actual item.

Pictures shown are for illustration purpose only. Not actual item.

  • 1st generation model, released from 2011 thru 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

  • DACT CT2 balanced stereo stepped attenuator

  • Anodized aluminum chassis, available in black or silver

  • Self-biasing with compatible tubes [chart]

  • Global voltage (100v–220v) without converter

  • 1-yr. limited warranty

  • 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 (1st gen) headphone amplifier [refurbished] 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

Rectifier Tube Upgrade 2

Power Tube Upgrade

Chatham 5998 Tube (In Pair)

Driver Tube Upgrade