Amplifier in excellent condition. Valves were replaced recently and re-biased. Please see our listing for matching Audio research SP-9 Pre amplifier here
Specifications:
Power output: 60 watts minimum continuous at 16 ohms from 15Hz to 20kHz with less than 1.0% THD (typically below .005% at 1 watt)
Power bandwidth (-3dB points): 12Hz to 40kHz
Frequency response
Input sensitivity: 550mV RMS for rated output
Input impedance: 100k ohms
Output taps: 4, 8, 16 ohms
Output regulation: Approximately 0.3dB, 16 ohm load to open circuit (equivalent to an output impedance of 0.56 ohms)
Overall negative feedback: 20dB
Damping factor: 30
Distortion
Slew rate: 20V/µs
Rise time: 2µs
Hum & noise: Less than 2.0mV RMS - 84dB below rated output (20kHz bandwidth, unweighted, inputs shorted)
Power supply energy storage: 280 joules
Power requirements: 105-125VAC 60Hz (210-250VAC 50Hz) 500W at rated output, 700W maximum, 370W at idle.
Tube complement: (4 matched pairs) 6550, (4) 6FQ7/6CG7
Other
Dimensions: 19" (48 cm) W x 7" (18 cm) H x 15.75" (40 cm) D. Handles extend 1 5/8" (4.1 cm) forward of the front panel. Output connectors extend 1" behind rear panel..
Weight: 63 lbs (28.64 kg) Net, 76 lbs. (34.55 kg) Shipping
