Lived in a smoke free environment. 300 or so hours on the tubes. Circle above power button is a silver LED light dim sticker. The blue power light is too bright for my taste. Woo Audio's GES is a great sounding all-tube headphone amplifier for Stax-type electrostatic headphones. It uses 6S4 and 12AX7 vacuum tubes in its circuitry and provides a luxurious and unique listening experience that only tube gear can provide – and Woo Audio is an expert in designing the highest quality vacuum tube components. The 800 volts peak voltage swing of the GES produces a greater dynamic range than many other electrostatic headphone amps, including the Stax. The GES uses push-Pull direct drive, Class-A circuitry using the highest quality internal components, including high-performance Solen and WIMA capacitors and point-to-point wiring. The tube complement consists of four 6S4 power tubes and four 12AX7 driver tubes in premium polytetrafluoroethylene (PTFE) tube sockets. The ALPS potentiometer and power switch provide a great feel during operation and are both exceptionally quiet. Connections consist of two pairs of RCA stereo inputs and one STAX Pro Bias 5-pin EarSpeakers output. The anodized aluminum chassis is available in black or silver.

Woo Audio GES STAX Electrostatic Headphone Amplifier Silver Model WA-GES - Tested Tested using STAX SR-30 headphones (not included)Both inputs working, selector switch on back workingVolume control working. Smooth potentiometer movement, not detentedWhen powered on, the Woo Audio GES STAX tube amplifiers blue LED indicator will flash, signaling the warm-up process. Once the amplifier has warmed up, the blue LED will stay lit continuously, indicating that the device is ready for use and sound is enabledIncludes power cord Includes set of 8 stock tube set from Woo Audio, as follows:x4 6S4 United Electron Tubesx4 12AX7 Electro-Harmonix TubesSpecs:Polytetrafluoroethylene (PTFE) tube socketsPush-Pull direct drive, Class-AHigh-performance Solen and WIMA capacitors, Point-to-Point wiringRCA input x 2STAX Pro Bias 5-pin EarSpeakers outputALPS potentiometer and power switchAnodized aluminum chassis - silver colorSelf-biasing with compatible tubes Global voltage (100v–240v) without converterDimensions: 5½(H), 13(W), 10½(D), 22.5 lbs.Standard signs of use. May have cosmetic wear and/or scuffs.Some scuffs and marks on left side of baseSome small nicks on top plates and various other areasSee photos for more detail. Includes only what is pictured. Includes AC power cord Does not include any additional cables/componentsThe buyer is responsible to confirm compatibility of this item with their existing system/setup. Return shipping cost due to incompatibility would be at the expense of the buyer. Purchase with confidence: We are experienced with selling and shipping this type of item and we will package properly for safe transit.Please do not hesitate to ask any questions prior to purchase. R2v3 CATEGORY C4/F4 NON-DATA

Woo audio GES electrostatic amplifier. This amp is in good working condition and has been able to run my SR 007s very well. I bought said 007s used and unfortunately they only lasted for about 4 years before one channel went out. Im selling because I would rather get a new graphics card than a new pair of headphones. Tubes are all original.