Manufacturer's Specifications
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Amplifier details
Specifications

 
   
Year of manufacture: 1953 -1955
Manufactured by: McIntosh Laboratory Inc, 2 Chambers Street Binghamton, NY
Price when new (in the USA): $143.50
Description: power amplifier
Mono/stereo: mono
Output level: 30 watts
Distortion: less than 0·5% at rated output
Frequency response: 20Hz - 30kHz ± 0.1dB; 10Hz - 50kHz ± 0.5dB
Noise and hum: -85dB
Inputs (sensitivity / impedance): 0.5V/500k
Tubes: 2 x 6BG6/1614 (output); 12AX7 (preamplifier); 12AU7/12BH7 (phase inverter); 12BH7(driver); 5U4GA (rectifier)
Output impedance: 4, 8 and 16 (isolated from ground); 600 (balanced to ground)
Damping factor: 12 for 4, 8 and 16
Dimensions: 8¼ in. x 8 in. x 12 in. (210 x 203 x 305 mm)
Weight: 33lbs (15 kg) less case