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WES (2nd gen) Electrostatic Headphone Amplifier

Woo Audio WES Electrostatic Headphone Amplifier Black
Woo Audio WES Electrostatic Headphone Amplifier Black

WES (2nd gen) Electrostatic Headphone Amplifier

from 4,499.00
  • BTO, ships in 2–3 weeks

  • Limited time, FREE shipping worldwide

    Have questions? Contact us.



WES (2nd gen) is the ultimate electrostatic headphone amplifier for use with STAX headphones. The new 2nd gen uses a matching quad of output loading chokes utilizing Single Crystal Copper wires (the purest form of copper) with our proprietary winding scheme. The results are a significant improvement in clarity, sound space, dynamic range, and control. WES is a two-chassis system comprising a power supply and a fully balanced amplifier and innovative dual power switch that treats the tubes more gently when starting the unit from cold. Turning on just one of the power switches provides low voltage to the heaters while the WES remains in standby mode. Turning on both power switches allows the unit to operate at full power. WES will reward the listener with reference quality sound without fatigue.

*1st gen WES owners can upgrade to 2nd gen. LEARN MORE


  • Updated to 2nd generation in April 2017

  • Tubes: EL34 power x 4, 6SL7 driver x 4, 5AR4 rectifier x 2, 12AU7 phase inverter x 2

  • Polytetrafluoroethylene (PTFE) tube sockets

  • Two 12AU7 phase splitter (unbalanced input to balanced input conversion)

  • Fully-balanced design, Class-A

  • Transformer-coupled, Point-to-Point wiring

  • Pseudo-dual power supply

  • STAX Pro Bias 5-pin EarSpeakers output x 2

  • XLR input x 2, RCA input x 1

  • Auricap capacitors for interstage and output coupling

  • Mills and Kiwame resistors

  • Balanced smooth potentiometer

  • Anodized aluminum chassis, available in black or silver

  • Self-biasing with compatible tubes [chart]

  • Global voltage (100v–220v) without converter

  • Dimensions: Amplifier: 7½"(H), 16½"(W), 12"(D) 20 lbs., Power supply unit: 4½"(H), 16½"(W), 12"(D) 20 lbs., DC cord length: 18” (end to end)

The Audiophile-grade premium internal parts upgrade adds the following. * Available exclusively at the time of build.

  • V-Cap Teflon Film Tin Foil reference grade audio capacitors - V-Cap TFTF 0.22uF/300V (12 pcs)

  • V-Cap Oil Impregnated Metallized Polypropylene reference grade audio capacitors - V-Cap OIMP 2uF/600V (4 pcs)


*Specifications and appearance are subject to change for improvement without notice.

*Specifications and appearance are subject to change for improvement without notice.

  • Quick start guide

  • WES (2nd gen) electrostatic headphone amplifier x 1

  • WES (2nd gen) power supply unit x 1

  • EL34 vacuum tubes x 4

  • 6SL7 vacuum tubes x 4

  • 5AR4 vacuum tubes x 2

  • 12AU7 vacuum tubes x 2

  • Umbilical DC cord x 1

*AC power cord and audio cables are not included

In the box


Power Tube Upgrade

EL34-PH Psvane Tube (In Quad)

Driver Tube Upgrade

Rectifier Tube Upgrade

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