This is a fantastic piece of electronics with a beautiful design and the excellent quality you would expect from McIntosh.
ELECTRICAL: Response 20-20kHz (+0 -0.5dB). Distortion 0.01%. Noise and hum -100dB aux, -90dB phono. Output rated 2.5V. Maximum output 10V. Input sensitivity and impedance: aux 0.25V (10V max) at 50k, phono 2mV (100mV max) at 47k and 65pF. Program equalizer: 30, 150, 500, 1500 and 10,000Hz boost or cut 12dB. LF filter 50Hz at 12dB/octave. HF filter 7kHz at 12dB/octave. Voltage gain 20dB aux, 62dB phono. Compandor ratios from 1:2 compress to 2:1 expand. Monitor Amplifier: 20W/ch into 8 ohms at 0.01% distortion, response 20-20kHz (+0 -0.2dB), sensitivity 0.75V, input impedance 27k, signal to noise A weighted 100dB.
FRONT PANEL: Glass panel. Illuminated. Listen selector: aux, tape 3, tape 2, tape 1, tuner, ph 1, ph 2. Mode selector: L to L+R, R to L+R, stereo rev, stereo, mono (L+R), L+R to L and L+R to R. Equalizer frequency: 30, 150, 500, 1500 and 10k, volume, Record selector: aux, tape 3, tape 2, tape 1, tuner, ph 1, ph 2. Pushbutton switches with indicator lights: compandor: listen or record, rec equal: in or out, rec monitor: in or out, LF and HF filter: in or out, speaker/output 1 and 2: in or out. power: on or off. Headphone jacks, Tape 3 input and output jacks. Compandor switch: expand, out or compress. Ratio 1 to 2, Balance, Loudness.
TOP PANEL: Monitor amplifier controls: left and right gain, input switch: external, listen or record. Compandor controls: level match, speed: fast, norm and slow. Auto-on sensitivity: min to max.
BACK PANEL: Outputs: 2, 1, main, tape 3, tape 2, tape 1, Monitor Amplifier: speaker push terminals, ext input, output. Speaker control relay socket. Inputs: tape 3, tape 2, tape 1, tuner, aux, phono 2, phono 1. Ground binding post. External processors: listen: to and from, record: to and from. AC outlets: 4 switched, 2 switched (turntable auto-on). Auto-manual switch. Fuse. Panloc mounting.
SIZE: 5-7/16"H, 16"W and 13"D behind panel. Weight 26 lb. Sold from 1981-1985.