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Year of manufacture: 1955-1961
Manufactured by: McIntosh Laboratory Inc, 2 Chambers Street Binghamton, NY
Price when new (in the USA): $198.50 (1959)
Description: power amplifier
Mono/stereo: mono
Power output: 60 watts RMS
Harmonic distortion: less than 0.3% at 60 watts
IM distortion: less than 0.5%
Frequency response: 20Hz - 30kHz ±0.1dB at 60 watts output
Input impedance: 500k for 0.5 volt input, 0.13m for 2.5 volt input
Hum & noise: 90dB below rated output
Output impedance: 4, 8, 16 and 600. (600 balanced to ground and center tapped. 4, 8 and 16 isolated from ground)
Damping factor: 12 for 4, 8 and 16
Tubes: 2 x 6550 output, 2 x 12AX7, 1 x 12AU7, 1 x 12BH7, 2 x 5U4 rectifiers
Dimensions: 8 in. x 10 in. x 14¼ in. (203 x 254 x 362 mm)
Weight: 46 lbs (20.9 kg)
Power consumption: 117-125 volts 50 - 60 c/s