Manufacturer's Specifications
amplifier menuMain Menu

Amplifier details
Specifications

 
   
Year of manufacture: 1961 - 1971
Manufactured by: McIntosh Laboratory Inc, 2 Chambers Street Binghamton, NY
Price when new (in the US): $275.00
Description: Power amplifier
Mono/stereo: mono
Power output: 75 watts RMS
Total harmonic distortion: 0.5%
Frequency response: 18 c/s - 40 Kc/s (+0 -0.1dB)
Loudspeaker impedances: 4, 8, 16, 67, 150 and 600 (all isolated from ground)
Internal impedence: 8% of rated impedance
Hum and noise: -90dB
Input sensitivity: 0.5V
Input impedance: 250K, plus approximately 5 mfd
Output voltages: 25, 70.7, 115 and 230V
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: 8¾" (H) x 7¾" (W) x 19" (D) (222 x 197 x 483 mm)
Weight: 50 lbs (22.7 kg)
Power supply:

117 or 125V