This is an Audio Research VT-100 mk. II stereo power amplifier. The amplifier is in excellent condition. It was manufactured in March of 2000 and is rated at 100 watts per channel at 8 ohms. I purchased this for a second system about 5 years ago and just have not used it enough to justify keeping it. It has the same tubes (Svetlanas) as when I bought it, so I cannot tell you much about their age. The amp sounds just fine to my ear, so I have never been motivated to change them out. Auction includes amp, original double boxes and packing materials, power cord, jumpers for unbalanced inputs, and owner's manual. Sorry, no shipping outside the US. More details on the amp from the web:
Power output 100 watts per channel continuous from 20Hz to 20kHz. Approximate actual power available at "clipping" 110 watts (1kHz)
Power bandwidth (-3dB points) 15Hz to 80kHz
Frequency response (-3dB points at 1 watt) 1Hz to 100 kHz
Input sensitivity 1.9V RMS (Bal or SE) for rated output. (23.5 dB gain into 8 ohms.)
Input impedance 200K ohms Balanced, 100K ohms Single-ended.
Output taps 8 ohms, 4 ohms
Output regulation Approximately 0.8dB 8 ohm load to open circuit
Overall negative feedback 10 dB
Damping factor 11
Distortion 1kHz total harmonic distortion typically 1% at 100 watts, below .05% at 1 watt
Slew rate 15 Volts/µs
Rise time 3 µs
Hum & noise Less than 0.5mV RMS 95dB below rated output (IHF weighted, input shorted)
Power supply energy storage VT100 MKII/III: 540 joules
Power requirements 105-125VAC 60Hz (210-250VAC 50Hz) 585 watts at rated output, 750 watts maximum, 380 watts at "idle"
Tube complement VT100 MKII: (4 matched pairs) 6550C power output, (4) 6922 driver, (4) 6922 input.
Dimensions 19" (48.3 cm) W x 8.75" (22.2 cm) H x 19.5" (49.5 cm) D. Handles extend 1.5" (3.8 cm) forward
Weight 65 lbs. (29.5 kg) Net; 83 lbs. (37.7 kg) Shipping.