McIntosh MC-2105 Service manual

FROM SERIAL

MclNTOSH LABORATORY INC. 2 CHAMBERS STREET BINGHAMTON, NEW YORK

NO.

10M01

TO

26M07

MC

2105

ELECTRICAL SPECIFICATIONS

POWER OUTPUT:

105 RMS watts continuous per channel into 4, 8, or 16 ohms
both channels operating.

HARMONIC DISTORTION:

Less than 0.25% at 105 watts power output from 20 Hz to 20
kHz, both channels operating. Typical performance is less
than 0.1% at rated power. Distortion decreases as output

is reduced.

INTERMODULATION DISTORTION:

Less than 0.25% if instantaneous peak power output is 210
watts or less per channel with both channels operating for
any combination of frequencies 20 Hz to 20 kHz.

FREQUENCY RANGE:

20 Hz to 20 kHz +0, -0.1 dB at rated power.
15 Hz to 60 kHz +0, -0.5 dB at rated power.
10 Hz to 100 kHz +0, -3.0 dB at rated power.

NOISE AND HUM:

90 dB or more below rated output.

OUTPUT IMPEDANCE:

4, 8, and 16 ohms

OUTPUT VOLTAGES:

25 volts (connect to 8 ohm outputs.)

DAMPING FACTOR:

18 at 4 ohms output
13 at 3 ohms output
10 at 16 ohms output

INPUT IMPEDANCE:

200,000 ohms

INPUT SENSITIVITY:

0.5 volts. Level control provided for higher input voltage.

POWER REQUIREMENTS:

117 volts AC 50-60 Hz, 90 watts at zero signal output, 450

watts at rated output.

INPUT SECTION PRINTED CIRCUIT

BOARD

043-795

LOCATION OF TRANSISTORS NOT ON PRINTED CIRCUIT BOARDS