McIntosh MC 502 Service Manual
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Extracted text from McIntosh MC 502 Service Manual (Ocr-read)
Page 1
IIIIInquh
MC 502
POWER AMPLIFIER
SERVICE INFORMATION
STARTING WITH SERIAL NC). CEIOOI
MCINTOSH LABORATORY INC. BINGHAMTON, NEW YORK 13903
039308
Page 2
MC502
PERFORMANCE LIMITS
PERFORMANCE
POWER OUTPUT RATING
STEREO-75 watts into 2.7 to A ohm loads, 50
watts into 8 ohm loads, minimum sine wave
continuous average power output per channel
from 20 Hz to 20,000 Hz, both channels opera
ting.
which is: IA.Z volts RMS across 2.7 ohms
I7.3 volts RMS across A ohms
20.0 volts RMS across 8 ohms
MONO (Bridged)~l50 watts into an 8 ohm load,
minimum sine wave continuous average power
output from 20 Hz to 20,000 Hz.
which is; 30.6 volts RMS across 8 ohms
OUTPUT LOAD IMPEDANCE
STEREO: 2.7 to 8 ohms
MONO: 8 ohms obtained by connecting across
the output terminals of both channels.
RATED POWER BAND
20 Hz to 20,000 HZ
TOTAL HARMONIC DISTORTION
STEREO: .021 maximum harmonic distortion
at any power level from 250 milliwatts to
rated power per channel From 20 Hz to
20,000 Hz, both channels operating.
MONO: .OZA maximum harmonic distortion at
any power level from 250 milliwatts to rated
power From 20 Hz to 20,000 Hz.
INTERMODULATION DISTORTION
STEREO: .022 maximum per channel with both
channels operating For any combination of
frequencies, 20 Hz to 20,000 HZ.
MONO: .02/ maximum at any power level from
ZSOmw to rated power for any combination of
frequencies, 20 Hz to 20,000 Hz
FREQUENCV RESPONSE (at one watt output)
20 HZ to 20,000 Hz, +0 -O,25 dB
l0 Hz to l00,000 HZ +0 -3.0 dB
NOlSE AND HUM
95 dB below rated output
RATINGS
OUTPUT VOLTAGES
25 volts for distribution lines
DAMPING FACTOR
Greater than 50
INPUT IMPEDANCE
75.000 ohms
INPUT SENSITIVITY
Switchable; 0.75 volt or 2.5 volts-Level
control provided For higher input voltages
GENERAL INFORMATION
POWER REQUIREMENTS
I20 volts, 50/60 Hz, 0.2 to A anperes
MECHANICAL INFORMATION
SIZE: Front panel measures l6 inches wide (00.6 cm)
by 3~5/8 inches high (9.2 Cm). Chassis measures
lA-S/h inches wide (37.5 cm) by 2~3/8 inches
high (6 cm) by lN-I/2 inches deep (36.8 cm),
including connectors. Knob clearance required
is I»l/h inches (3.2 cm) in front of nounting
panel.
WEIGHT: 27 pounds (l2.2 kg) net, 38 pounds
(l7.2 kg) in shipping carton