WooAudio6 - Single-ended Triode Class-A Tube Headphone Amplifier, Output Transformer Coupled

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Sophia Princess Mesh Plate 274B on WA6. Sold individually or for upgrade.

It was almost magical the way the Woo WA6 made every recording sound better than I thought it was.

The WA6 offer great sound and great value! - Tone Audio, issue 8

Awesome! Amazing sound! I know I use these heavy words now and I promised myself I wouldn't as I do not get excited very easily and I did not want to cause a stir with this review and then make people have high expectations. But I do think the sound is indeed awesome.

I never really knew how good the HD-600's could sound until hearing them through the WA6. Anyone that says the HD-600's are dark or veiled hasn't tried the correct headphone.

The soundstage or spatial placement of sound is excellent, but in my opinion this is also dependant on the music, recording quality and headphones used. Overall clarity is excellent, it sounds natural and the sound is clean/undistorted without a morsel of off sound or graininess.

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: $585

* Power supply umbilical cord is included.

* 1 pair of 6DE7, and 1 tube rectifiers are included.

* AC Power cord and RCA interconnect cables 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: 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 6DE7 [PDF] drive/power tubes
All tubes. No semi-conductors in the entire circuitry
High or low headphone impedance switch
One ¼" headphone jack
80 watts specially made toroidal power transformer.
Full aluminum die-cast chassis, alodinze finished
Whole aluminum volume knob and power switch button
Gold-plate RCA
Alps potentiometer and power switch
Dale and Vishay high precision resistors
Teflon wires

Brief Introduction to 6DE7:

6DE7 is a dual triode tube, consisting of one drive triode and one power triode. Its performance is similar to a combination of a 6SN7 and a 2A3.

Power supply upgrade:
Pseudo Dual power supply (PDPS) circuit upgrade $60

A significant and cost effective upgrade to improve sound quality.

Teflon tube sockets upgrade:
$75 (9-pin x2, 8-pin x1)
Teflon is a superior material with great isolation and tempreture endurance. The unique design of multiple pin contact area greatly increase connectivity and gripping. Pins are gold-plated over oxygen free copper.

Click to see details 2 3 4

Rectifier tube replacement:
Sophia Princess Mesh Plate 274B rectifier $150 (1 pc)
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 replacement:
1 matched pair 6DE7 $17 (2 pcs)

NOS tube. Buy and ship independently.