Woo Audio WES Electrostatic Headphone Amplifiier

Woo Audio

WES is an uncompromised design, featuring EL34, 6SL7, and 5AR4-5U4GB rectifier.

  • All-triode drive, fully balanced. Two units design - AMP unit and Power Supply unit with dual power switch. Innovative stackable chassis with exposed tubes. A standard unit now build with 2 STAX headphone outputs. The HE90 output is optional.

    • Point-to-Point Wiring
    • Four EL34 power tubes
    • Four 6SL7 drive tubes
    • Two 5AR4 rectifier tube. Direct substite: 5U4GB
    • Two 12AU7 phase splittor (back of the AMP unit) - unbalanced input to balanced input conversion
    • Two selectable balanced inputs
    • One selectable unbalanced input
    • One 5-pin pro bias output
    • One HE-90 output
    • DACT CT4 stepped attenuator
    • Auricap capacitors for inter-stage and output coupling
    • Mills and Kiwame resistors
    • Telfon tube sockets
  • Fully balanced topology

    Peak-peak voltage swing: 1300 volts 

    Stax PRO bias: 580V

    Sennheiser HE90 bias: 500V
    * Dual power switch
    Standard chassis size
    Removable glass panel

    External dimension:

    PSU: 4.5"(H), 16.5"(W), 12"(D)

    AMP: 7.5"(H), 16.5"(W), 12"(D) (with tube guard)

    Weight (AMP + PSU): 40 pounds or 18.2 kg

    * From a cold start, the dual power switch protects the tubes from a high current surge. Turning on just one of the power switches provides low voltage to the heaters while the unit remains in stand-by mode. Turning on both power switches allows the unit to function properly.