McIntosh MC-250 Service manual

MC 250

SERVICE INFORMATION

STARTING

MCINTOSH LABORATORY INC. 2 CHAMBERS STREET BINGHAMTON, NEW YORK

WITH

SERIAL

NO.

23L48

MC 250

ELECTRICAL SPECIFICATIONS

Power Output:

100 watts RMS continuous, 50 watts per channel operating
simultaneously, into 4 ohm, 8 ohm, or 16 ohm loads.

Harmonic Distortion:

Less than 0.25% at rated power output from 20Hz to 20,000Hz.

Intermodulation Distortion:

Less than 0.25% for any combination of frequencies between
20 Hz and 20,000 Hz.

Frequency Range:

At rated output both channels: +0 to -0.25dB from 20Hz

through 20,000Hz.

Output Damping Factor:

Greater than 10 for any output tap.

Input Sensitivity & Impedance:

Input sensitivity is 0.5 volts. Input impedance Is 200K ohms.

Hum & Noise :

Greater than 90dB below rated output.

Power Requirements:

117 volts AC,50-60Hz, 50 watts at zero signal output, 250

watts at rated output.

MC 250