High performance headphone amplifier in a compact size. Realistic, warm, smooth sound. Versatile design to drive a wide range of full-sized headphones and in-ear monitors.
The 2 small tubes on the front are the 13DE7 driver/power tubes, and the large one on the back is a rectifier tube.
The front panel (left to right) consists of a 1/4" (6.3mm) headphone jack, a volume control, and a power switch button.
Die-cast aluminum body
Lower angle view
Side
Back panel, left to right, has AC110 and 220/240V voltage selector, a AC inlet with fuse box, a headphone impedance selection toggle switch, and a pair of RCA input.
Top view. Under the aluminum housing, it sits a high performance power supply.
Tubes compartment
WA6
WA6
WA6
WA6
Sophia Princess Mesh Plate 274B on WA6. Sold individually or for upgrade.

All can say is wow! As you know I am a conductor of classical music and can honestly say that it is like hearing cd's for the first time - Jeffrey Milarsky, Conductor of the Columbia University Orchestra.

I just wanted to let you know that I received my WA6 yesterday in good order. Though I know it is not broken in yet and it will only get better; after a couple hours of warm-up time it sounds totally awesome. So good in fact that I listened to many favorite recordings long into the night. And the fit and finish is first rate at any price, for the money I am VERY impressed to say the least. - Email noted by RD.

Price: $629

* 1 pair of 13DE7 (or equivalent) and 1 rectifier tubeare included.

* AC Power cord and RCA interconnect cables are not included.

* Shipping charge applied to CONUS only. International shipping charge will be invoiced when your order is in our system.

Owner's Manual(PDF) pdf-icon

    Technical Specifications :
  • Headphones impedance : 8-600 Ohms
  • Input impedance: 100 Kilo-Ohms
  • Frequency response: 20 Hz - 30 kHz, -3dB
  • Signal/Noise: 93 dB
  • THD: <= 0.3%
  • Voltage: AC 110/220 V, 50/60 Hz
  • External dimension: 6"(H), 5½(W), 13"(D)
  • Weight: 13.5 lbs
    Standard Features:
  • Point-to-Point wiring
  • One 5AR4 [PDF] rectifier tube. Direct substitute: 5U4G
  • Two 13DE7 [PDF] drive/power tubes
  • Pseudo-dual power supply
  • All tubes. No semi-conductors in the entire circuitry
  • High or low headphone impedance switch
  • One 1/4" (6.3mm) headphone jack
  • 80 watts specially made toroidal power transformer.
  • Full aluminum die-cast chassis, anodized finish
  • Whole aluminum volume knob and power switch button
  • Gold-plate RCA
  • Silver-plated hook-up wires in Telfon jacket

Rectifier tubes upgrade 1:
Takatsuki TA-274B single
$1045 (1 pc) with 1-year warranty

Takatsuki 274B offer ultimate performance to any current production 274B's. Users have claimed that it exceeds the quality to NOS Western Electric 274B.

The TA-274B sold in an individual package Click to see details.

Rectifier tubes upgrade 2:
KR 274B High-Resolution, single
$647 (1 pc) with 6-month warranty

The KR Audio 274B HP rectifier tube is a perfect compliment to any tube amplifier’s high voltage power supply. Solidly made and very low in microphonics make this a no brainer to properly power the finest tube amplification. This latest high performance design better controls both electrical and vibrational resonances that blur imaging for greater clarity to the source.

Image of a KR 274B HR rectifier

Rectifier tube upgrade 3:
Sophia Princess Mesh Plate 274B rectifier
$160 (1 pc) with 30-day warranty
To impact WA6's sound quality or for your super backup. 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.

Drive/Power tube option:
1 matched pair of 13EM7 plus one pair of 13EM7->13DE7 Teflon tube adapters.
$150 (2 tubes + 2 adapters). NOTE: 13EM7 can NOT be used on the 1st gen which has a '6DE7' label printed next to the tube sockets.

The 13EM7 is the ultimate driver/power tube for the WA6. It has great extension and excellent clarity on all frequency range. You will hear each note with breathing air around it. The sound is smooth and well balanced.

This tube is compatible to the WA6. You will need to use a tube adapter becaue the pin layout is different than the 13EW7. It is a twin triode tube with high amplification factor. It produces higher output.

Click to see details 2 3

NOS tube. Buy and ship independently.