The center tube is rectifier tube. A pair of 6SN7 driver tubes sit on both side. A pair of 6080/6SA7/7236 power tubes place on either side of the amp.
Face panel from left to right: balanced volume control, 3-pin XLR headphone output, 4-pin XLR headphone output, 1/4 (6.3mm) inch headphone output, high/low impedance switch and power switch.
Right side
Multiple-outputs in different terminals that allow 3-pin XLR mono, 4-pin XLR stereo, and 1/4" phone jack
The volume control is a 4-channel balanced stepped attenuator.
Back panel from left to right: AC inlet with fuse box, AC110 and AC220/240V voltage switch, RCA audio input, XLR audio input, RCA and XLR selector.
WA22 hd800 and T1
Price: $1995

* 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.

Owner's Manual(PDF) pdf-icon

    Technical Specifications:
  • Headphones impedance : 8-600 Ohms
  • Input impedance: 100 Kilo-Ohms
  • Frequency response: 8 Hz - 50 KHz, -3dB
  • Output: 1500mw @32 ohms, 700mw @600 ohms
  • 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:
Tung Sol 7236 NOS 1963
Hand-pick matched pair
$160 (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
Sylvania 6SN7GT NOS tubes
We tested these tubes in an actual amplifier to ensure the highest quality.
$330 (2 pcs) with 30-day warranty.

You get a clean and dense sound image with these tubes. It is very low noise, smooth and delicate in the upper frequency range, deep and solid bass, high clarity.

Rectifier tube replacement:
Sophia Princess Mesh Plate 274B rectifier
$160 (1 pc) with 30-day warranty
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.