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Year of manufacture: 1961-1967
Manufactured by: McIntosh Laboratory Inc, 2 Chambers Street Binghamton, NY
Price when new (in the USA): $198
Description: power amplifier
Mono/stereo: Stereo
Power output: 25 watts RMS per channel, 50 watts mono
Distortion: 0·5% at rated power
Frequency response: 18Hz - 30kHz ± 0.1dB
Hum & noise: -90dB
Controls: stereo, twin and mono inputs, twin amp gain , mono gain and balance controls, stereo, twin & mono input switch
Output impedance: 4, 8, 16, 125 and 600 (600 centre tap internally grounded)
2, 4, 8, 16 and 32 (in mono)
Input sensitivity & impedance: 0.5V (in mono or twin amp mode). 2.0V in stereo; 250k
Phase shift: less than ±6°
Tubes: 4 x 7591 output; 1 x 12AX7; 2 x 12AU7; 2 x 12BH7; solid state rectifier
Dimensions: 14½ x 9½ in. x 7 inches (368 x 232 x 178 mm)
Weight: 34 lbs (15.45 kg)
Line voltage: 117/125 volts