Audio Research D-76A:
Power output 75 Watts per channel minimum RMS (both channels operating) into a 4, 8 or 16 ohm load from 20 Hz to 15 kHz with less than 1% total harmonic distortion
Power bandwidth
Frequency response
Input sensitivity 1.5 volts for rated output
Input impedance 80K ohms at 20 Hz; 30K ohms at 15 kHz
Output taps 4, 8, 16 ohms
Output regulation
Overall negative feedback
Damping factor 14 at 8 ohms (1 kHz)
Distortion Intermodulation distortion: less than .5% at rated power
Slew rate
Rise time
Hum & noise More than 80 dB below rated output
Power supply energy storage
Power requirements 220VAC; 50-60 Hz, 550 watts at rated power output
Tube complement (4)12AX7, (8) 6FQ7, (2 matched pairs) 6550, (1) 6550
Other
Dimensions 19" W x 7" H x 12 ¼" D.
Weight 52 lbs. Net, 63 lbs.
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