Manufacturer's Specifications
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Amplifier details
Specifications
original sales brochure

 
   
Year of manufacture: 1959 -1963
Manufactured by: McIntosh Laboratory Inc, 2 Chambers Street Binghamton, NY
Price when new (in the USA): $269.00 (wood case, mahogany or walnut - $24.95)
Description: preamplifier
Mono/stereo: Stereo
Output level: 2.5V
Distortion: less than 0·2% at rated output
Frequency response: 20Hz - 20kHz ± 0.5dB
Noise and hum: -85dB
Inputs (sensitivity / impedance): Auxiliary, tape & tuner 1 & 2: 0.25mV at 470K
phono - low: 2.5mV at 47K, high: 12.5mV at 47K
crystal phono: 0.1V, very high impedance
Tape head: low - 1.25mV at 47K, high: 6.25mV at 130K
Tape monitor: 0.25V at 130K
Tone controls: treble +13dB -18dB at 20kc/s; bass +16dB -20dB at 20c/s
Input sensitivity and impedance: 250mV high level inputs at 470k (tape, aux, tuners), phono 2mV at 47k
Tubes: 2 x 12AU7; 5 x 12AX7; 1 x 6X4
Dimensions: 15¾ in. x 12 in. x 5 in. (397 x 305 x 124 mm)
Weight: 20lbs (9.1 kg) less case
Power consumption: 110-120 volts 50 - 60 c/s