Manufacturer's Specifications
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Amplifier details
Specifications

 
   
Year of manufacture: 1961 - 1970
Manufactured by: McIntosh Laboratory Inc, 2 Chambers Street Binghamton, NY
Price when new (in the US): $229.00
Description: Power amplifier
Mono/stereo: mono
Power output: 75 watts RMS
Total harmonic distortion: 0.5%
Frequency response: 16 c/s - 40 Kc/s (+0 -0.1dB)
Loudspeaker impedances: 4, 8, 16, 67 and 600. (600 center tap internally grounded)
Hum and noise: -90dB
Input sensitivity: 0.5V
Input impedance: 250K, plus approximately 5 mfd
Output voltages: 25V (isolated), 70.7V (one side grounded) and 230V (center tap grounded)
Tubes: 2 x KT88/6550 output, 1 x 12AX7, 1 x 12AU7, 1 x 12AZ7 (or 12AT7) , 1 x 12BH7. Solid state rectifier bridge
Dimensions: 8¼" (H) x 8¼" (W) x 16¾" (D) (203 x 311 x 438 mm)
Weight: 44 lbs (20 kg)
Power supply: 117 or 125V