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Year of manufacture: 1954-1962
Manufactured by: McIntosh Laboratory Inc, 2 Chambers Street Binghamton, NY
Price when new (in the USA): $153.00
Description: power amplifier
Mono/stereo: mono
Power output: 30 watts RMS
Harmonic distortion: less than 0.33% at 30 watts output, 20Hz - 20kHz
Intermodulation distortion: less than 0.5% if instantaneous peak power is below 60 watts for any combination of frequencies 20Hz - 20kHz
Frequency response: 20Hz - 30kHz ± 0.1dB at 30 watts output
15Hz - 50kHz ± .5dB at 30 watts output
10Hz - 100kHz ± 1dB at 15 watts output
Input impedance: 500k for 0.5V input and 130k for 2.5V input, 20Hz - 40kHz
Hum & noise: 90dB below rated output
Output impedance: 4, 8, 16 and 600 (600 balanced to ground; 4, 8 & 16 isolated from ground.)
Damping factor: 12 or better for 4, 8 & 16 - later versions equipped with variable damping control; 16 for 600
Phase shift: 20 cycles 3°; 20,000 cycles 9°
Sensitivity Input 1 (jack & screw terminals and pin 5 of pre-amp socket) - 0.5 volts to 30 volts
with gain control Input 2 (pin 2 of pre-amp socket) - 2.5 volts (for use with McIntosh pre-amp)
Tubes: 2 x 1614 output, 2 x 12AX7 (pre-amp & driver), 12AU7 (phase inverter), 12BH7 (voltage amp), 5U4 (rectifier)
Dimensions: 8 in. x 8 in. x 13 in. (203 x 203 x 330 mm)
Weight: 30.5 lbs (13.9 kg)
Power consumption: 117-125 volts 50 - 60 c/s; 135 watts at full power, 105 watts at zero signal output