Right angel view
Balanced volume control, 3-pin XLR, 4-pin XLR, 1/4 inch phone jack, high and low impedance switch and power switch.
WA22 left angel view
WA22 side view
WA22 top view
WA22 back panel
WA22 in black finish
WA22 in black finish
Price: $1900

* Included tubes: 1 pair of 6AS7, 1 pair of 6SN7, and 1 5AR4

* Tubes shown on the pictures are not included.

* AC power supply cord, interconnection cable are not included

* Shopping cart applies to the U.S. buyers only. International buyers please contact for shipping cost and payment instruction.

    Technical Specifications:
  • Headphones impedance : 8-600 Ohms
  • Input impedance: 100 Kilo-Ohms
  • Frequency response: 8 Hz - 50 KHz, -3dB
  • Output: 810 mw with 6080, 2 watts with 7236 power tubes
  • Signal/Noise: 92 dB
  • THD: <= 0.3%
  • External dimension: 7”(H), 12”(W), 10.5”(D)
  • Weight: 25 pounds or 11.4 kg
  • Voltage: AC 110/220V, 50/60 Hz
    Standard Features:
  • Point-to-Point wiring
  • True balanced topology
  • All tubes. No semi-conductors in the entire circuitry
  • One 5AR4 [PDF] rectifier tube. Direct substitute: 5U4G
  • Two 6SN7 [PDF] drive tubes
  • Two 6AS7 / 6080 [PDF] power tubes
  • DACT CT2 balanced stereo stepped attenuator
  • One balanced XLR input
  • One single-ended RCA input
  • Two 3-pin balanced headphone output (left and right ch)
  • One 4-pin balanced headphone output
  • One single-ended headphone output
  • High and low impedance switch

Power tubes upgrade:
Sylvania 7236 NOS 1963
Hand-pick matched pair
$110 (2 pcs)

One of the best power tubes available for this amp. The 7236 vastly improves dynamic and soundstage. It has a very good speed, warm mid range, tight and deep bass. Buy and ship separately.

Driver tubes upgrade:
Hand-pick matched pair
Shuguang Treasure CV181-Z / 6SN7GT
$320 (2 pcs) with 12-month warranty

Low noise, very high resolution, extended full frequency range. True "Treasure" as a result of Shuguang's 50 years of expertise in vacuum tube design and production.

Rectifier tube replacement:
Sophia Princess Mesh Plate 274B rectifier
$150 (1 pc)
Wide open soundstage, full body, silky smooth, a great combination with the above tubes. Buy and ship independently.

Sophia Electric™ 274B tube is a premium rectifier tube for a 5U4/5R4/5AR4 direct replacement with 3X longer plate structure, thus it has a deeper, wider sound stage and even smoothier sound than Mullard 5AR4.