Audio Research GS150

For sale is an excellent condition (see pictures) Audio Research GS150. Amp comes complete with all accessories, manual, and original double-box. Original KT150 tubes have about 2800 hours, I am including a complete set of output tubes from Upscale Audio with less than 20 hours on them with this sale (will ship them in a separate box). Very neutral sounding unit and plenty of reviews online.

Specifications
• POWER OUTPUT: 155 watts per channel continuous from20Hz to 20kHz. 1kHz total harmonic distortion typically 0.6% at 155 watts, below 0.03% at 1 watt.
• POWER BANDWIDTH: (-3dB points) 5Hz to 80kHz
• FREQUENCY RESPONSE: (-3dB points at 1 watt) 0.5Hz to 120 kHz
• INPUT SENSITIVITY: 2.0V RMS BAL for rated output. (24 dB Bal gain into 8 ohms.)
• INPUT IMPEDANCE: 300K ohms Balanced
• OUTPUT TAPS: 8 ohms, 4 ohms
• OUTPUT REGULATION: n/a
• OVERALL NEGATIVE FEEDBACK: 14dB
• DAMPING FACTOR: n/a
• DISTORTION: n/a
• SLEW RATE: 13 volts/microsecond
• RISE TIME: 2.0 microseconds
• HUM & NOISE: Less than 0.1mV RMS – 114dB below rated output (IHF weighted, input shorted)
• POWER SUPPLY ENERGY STORAGE: Approximately 1040 joules
• POWER REQUIREMENTS: 105-125VAC 60Hz (210-250VAC 50Hz) 730 watts at rated output, 900 watts maximum, 420 watts idle.
• TUBE COMPLEMENT: (4 matched pair) KT150 power output, (4) 6H30 driver
• OTHER: Output Polarity Non-inverting. Balanced input pin 2+ (IEC-268). Controls: Rotary selector for tube bias, Power on/off, fan speed, auto shut-off on/defeat, RS232, 12V trigger.
• DIMENSIONS: Width 19” (483 mm). Height 9 ⅞” (251 mm). Depth 22 ½” (572 mm).