McIntosh MC 50 Service Manual

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mtlniush

MC 50

P0 WER AMPLIFIER

SERVICE INFORMATION

STARTING WITH SERIAL N0. IOUOI

MclNTOSH LABORATORY INC. 2 CHAMBERS STREET BINGHAMTON, NEW YORK

09 3W

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ELECTRICAL SPECIFICATIONS

PERFORMANCE

Mclntosh audio power ratings are in accordance with
the Federal Trade Commission Regulation of Novem-
ber 4, 1974 concerning power output claims for ampli-
fiers used in home entertainment products.

powen OUTPUT
50 watts minimum sine wave continuous
average power output, operating into 4
ohms, 8 ohms, or 16 ohms load impe-
dance, which is:
14.1 volts RMS across 4 ohms
20.0 volts RMS across 8 ohms
28.3 volts RMS across 16 ohms

OUTPUT LOAD IMPEDANCE
4 ohms, 8 ohms, or 16 ohms; separate ter-
minals are provided for each output

RATED POWER BAND
20 Hz to 20,000 Hz

TOTAL HARMONIC DISTORTION
0.25% maximum harmonic distortion at
any power level from 250 milliwatts to 50
watts from 20Hz to 20,000 Hz

INTERMODULATION DISTORTION

0.25% if instantaneous peak power output is 100 watts
or less for any combination of frequencies 20 Hz to
20,000 Hz

FREQUENCY RESPONSE

20 Hz to 20.000 Hz +0 -0.25 db
10 Hz to 100,000 Hz +0 -3.0 dB at one watt output

NOISE AND HUM
90 dB below rated output

RATINGS

OUTPUT VOLTAGES
25 volts for distribution lines

DAM PING FACTOR

25 at 4 ohms output
50 at 8 ohms output
17 at 16 Ohms Output

INPUT IMPEDANCE
200,000 ohms

lNPUT SENSITIVITY
0.5 volt. Level control provided for higher input voltage

GENERAL INFORMATION

POWER REQUIREMENTS

120 volts, 50/60 Hz, 15 watts at zero signal output,
120 watts at rate output

SEMICONDUCTOR COMPLEMENT

12 silicon transistors
12 silicon rectifiers and diodes

MECHANICAL INFORMATION

SIZE

51/2 inches high (13.97 cm), 8 inches wide (20.32 cm),
121/2 inches deep (31.75 cm)

CHASSIS

Chrome and black

WEIGHT
20 pounds (9.07 kg) net, 24 pounds (10.89 kg) in ship-
ping carton