WES - WooAudio Electrostatic Headphone AmplifiierWES 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 switchInnovative stackable chassis with exposed tubes. NEW: A major revision is in place for further sound quality refinement (2011 rev). NEW: A standard unit now build with 2 STAX headphone outputs. The HE90 output is optional. Standard Features:Point-to-Point WiringFour EL34 power tubesFour 6SL7 [PDF] drive tubesTwo 5AR4 [PDF] rectifier tube. Direct substitute: 5U4GBTwo12AU7 [PDF] phase splittor (back of the AMP unit) - unbalanced input to balanced input conversionTwo selectable balanced inputsOne selectable unbalanced inputOne 5-pin pro bias outputOne HE-90 outputDACT CT4 stepped attenuatorAuricap capacitors for inter-stage and output couplingMills and Kiwame resistorsTelfon tube sockets

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