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Woo Audio WA6 SE Tube Headphone Amp

This dual chassis headphone amplifier from Woo Audio blends incredible engineering with sublime tube power. Separating the power from the input section aids the overall sound by isolating sensitive electronic components, reducing the noise floor and allowing each section to operate at its fullest potential.


WA6-SE (2nd gen) is the dual chassis big brother of WA6 (2nd gen). It is also an all-tube design with point-to-point wiring, Class-A, transformer-coupled, single-ended triode (SET) headphone amplifier. WA6-SE (2nd gen) features an independent power supply unit which greatly improves its sonic performance. It can drive most dynamic driver and planar magnetic headphones ranging from 8–600 Ohms to their full potential; delivering a rich tube sound with speed and dynamics typically not found in an amplifier of this size. Whether you have one headphone or ten, WA6-SE (2nd gen) would maximize the listening enjoyment.

Updated to 2nd generation in April 2017
2nd gen is a minor update to driver/power tubes from 6DE7 to 13DE7 (1st and 2nd gen tubes incompatible)
Tubes: 13DE7 driver/power x 2, 5U4G rectifier x 1
Polytetrafluoroethylene (PTFE) tube sockets
Single-ended Triode, Class-A
Transformer-coupled, Point-to-Point wiring
Pseudo-dual power supply
RCA input x 2
Dual 1/4" (6.3mm) stereo headphone outputs (HI / LO impedance)
ALPS potentiometer and power switch
Anodized aluminum chassis, available in black or silver
Self-biasing with compatible tubes [chart]
Global voltage (100v–240v) without a converter
Dimensions: 6"(H), 5½"(W), 13"(D) amplifier 12 lbs., 6"(H), 5½"(W), 13"(D) power supply 10 lbs.

Product Specification
Headphones Impedance:
8-600 Ohms
Input Impedance:
100 Kilo-Ohms
Frequency Response:
15 Hz - 40 KHz, -3dB
Power Output:
2000mW @32

1900mW @60

1800mW @120

1300mW @300

800mW @600

(with 6CY7 tube)
Signal/Noise: 93 dB
<= 0.3%
AC 110/220 - 240V, 50/60 Hz, switchable
External Dimension, end to end
measurement, same for both units:
6" (H) x 5.5 (W) x 13" (D)
Weight (AMP & PSU):
22 pounds or 10 kg