McIntosh MC 2500, Owner'S Manual

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Performance Limits
PERFORMANCE GUARANTEE
Performance Limits are the maximum deviation
from perfection permitted for a Mclntosh instru-
ment. We promise you the MC 2500 you buy must be
capable of performance at or exceeding these limits
or you get your money back. Mclntosh is the only
manufacturer that makes this guarantee.
PERFORMANCE
Mclntosh audio power ratings are in accordance
with the Federal Trade Commission Regulation of
November 4, 1974 concerning power output claims
for amplifiers used in home entertainment products.
POWER OUTPUT
STEREO
500 watts minimum sine wave continuous average
power output, per channel, both channels operating
into 1 ohm, 2 ohms, 4 ohms, or 8 ohms load im-
pedance, which is:
22.4 volts RMS across 1 ohm
31.6 volts RMS across 2 ohms
44.7 volts RMS across 4 ohms
63.2 volts RMS across 8 ohms
MONO
1000 watts minimum sine wave continuous average
power output into 0.5 ohm, 1 ohm, 2 ohms, 4 ohms, 8
ohms, or 16 ohms load impedance, which is:
22.4 volts RMS across 0.5 ohm
31.6 volts RMS across 1 ohm
44.7 volts RMS across 2 ohms
63.2 volts RMS across 4 ohms
89.4 volts RMS across 8 ohms
126.5 volts RMS across 16 ohms
OUTPUT LOAD IMPEDANCE
STEREO
1 ohm, 2 ohms, 4 ohms, and 8 ohms; separate ter-
minals are provided for each output.
MONO-PARALLEL
0.5 ohm, 1 ohm, 2 ohms, and 4 ohms; obtained by
connecting in parallel the appropriate terminals of
both channels.
MONO-BRIDGED
2 ohms, 4 ohms, 8 ohms, or 16 ohms; obtained by
connecting to the output terminals of both channels.
The bridged output is balanced to ground. Neither
side is grounded.
RATED POWER BAND
20 Hz to 20,000 Hz
TOTAL HARMONIC DISTORTION
STEREO
0.02% maximum harmonic distortion at any power
level from 250 milliwatts to 500 watts per channel
from 20 Hz to 20,000 Hz, both channels operating.
MONO
0.02% maximum harmonic distortion at any power
level from 250 milliwatts to 1000 watts from 20 Hz to
20,000 Hz.
INTERMODULATION DISTORTION
STEREO
0.02% maximum if instantaneous peak power out-
put is 1000 watts or less per channel with both chan-
nels operating for any combination of frequencies,
20 Hz to 20,000 Hz.
MONO
0.02% maximum if instantaneous peak power out-
put is 2000 watts or less for any combination of fre-
quencies, 20 Hz to 20,000 Hz.
FREQUENCY RESPONSE (at one watt output)
20 Hz to 20,000 Hz +0 -0.25 dB.
10 Hz to 100,000 Hz + 0.25 - 1 dB.
NOISE AND HUM
95 dB below rated output.
RATINGS
DAMPING FACTOR
Greater than 30
INPUT IMPEDANCE
50,000 ohms.
INPUT SENSITIVITY
Switchable: 0.75 volt or 2.5 volts—Level control pro-
vided for higher input voltages.
POWER GUARD
THD not to exceed 2% with up to 20 dB overdrive at 1
kHz.
GENERAL INFORMATION
POWER REQUIREMENTS
120 Volts 50/60 Hz 0.7 to 22 amps., 15 amps UL/CSA
SEMICONDUCTOR COMPLEMENT
91 silicon transistors
35 silicon rectifiers and diodes
6 integrated circuits
MECHANICAL INFORMATION
SIZE
Front panel measures 19 inches wide (48.26 cm) by
10½ inches high (26.67 cm). Chassis measures 17 in-
ches wide (43.18 cm) by 10 inches high (25.4 cm) by
17 inches deep (43.18 cm), including connectors.
Clearance in front of mounting panel including
knobs 2 inches (5.08 cm)
FINISH
Front panel is anodized gold and black. Chassis is
black baked enamel.
MOUNTING
Standard 19" (48.26 cm) rack mounting
WEIGHT
129 pounds (58.5 kg) net, 144 pounds (65.3 kg) in
shipping carton
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