Woo Audio at Audio46

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Woo Audio WA234-MONO Headphone/Integrated Amplifier

Product SKU: WA234-MONO black


Special order

Noncancelable and nonreturnable. It can take 3 to 4 weeks for Woo Audio to ship it out

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Product Details

(Specifications and appearance of this product are subject to change without notice)
↓ Details provided by Woo Audio


The WA234-Mono is the ultimate SET (single-ended triode) amplifier. The design is unlike any that the world has ever seen. The WA 234 unique design allows for us of legendary tubes like the 300B, 2A3 and 45 triodes. The choice of tubes offers the highest level of transparency and musicality. The WA234-Mono let you experience music like never before. You can now use any headphone and many high efficiency speakers. Whereas a typical tube amplifier allows you to use only one type of power tube (or a substitute with a similar rating), the 234-MONO increases your options in an elegant way. A tube-switching key (TSK) allows the amplifier to accept 2A3, 300B, or 45 power tubes, so you can instantly switch your tube to suit your music or your mood.


Output switching key (OSK) allows the listener to switch between speaker and headphone output modes, making it possible to enjoy a piece of music through headphones, then immediately share it with friends through speakers. To make the 234-MONO even more versatile, Woo Audio created output-switching keys for cathode and plate outputs for high and low-impedance headphones.



  • Monoblock design

  • Tubes: 13EM7 driver x 1, 300B power x 1, 5U4G rectifier x 1 each amplifier

  • Compatible with 2A3/300B/45 power tubes

  • Single-ended Triode, Class-A

  • Transformer-coupled, Point-to-Point wiring

  • Independent headphone and speaker circuity

  • Selectable Cathode or Plate output with KEYS

  • Anodized aluminum chassis, available in Diamond Black or Platinum Silver

  • Polytetrafluoroethylene (PTFE) tube sockets

  • Self-biasing with compatible tubes [chart]

  • Dimensions without tubes: 10" (H) x 8.75" (W) x 13.25" (D), 60 lbs. / 254mm (H) x 222.25mm (W) x 336.55mm (D), 27.21 kg.

  • Voltage (100v–240v) factory configurable

  • Designed and assembled in New York, USA

  • Three-year limited warranty [learn more]

In the box

  • Quick start guide

  • WA234-MONO amplifier x 2 [left and right channel]

  • WA234-MONO KEYS system [full set] x 1

  • 13EM7 vacuum tube x 2

  • 300B vacuum tube x 2

  • 5U4G vacuum tube x 2

*AC power cord and audio cables are not included


Power Output: 8W @300B, 4W @2A3, 2W @45

Frequency Response: 5 Hz - 62 kHz, -2 dB on Cathode Output

Attenuator: Seiden 46-position stepped, M-TubeCap, V-Cap

Casing: Cursive Aluminum with CNC machining

Mains Supply: 110/220VAC, 50/60 Hz

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