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McIntosh Laboratory, Inc. 2 Chambers Street, Binghamton, New York 13903-2699
Tel (607) 723-3512 - US Toll-Free (800) 538-6576 - Fax: (607) 724-0549- www.mcintoshlabs.com
For the Consumers Protection: In order to ensure the highest level of customer satisfaction, new McIntosh
products may only be purchased over-the-counter or delivered and installed by an Authorized McIntosh Dealer.
McIntosh products that are purchased over the Internet, by phone or mail order are presumed to be used and
do not qualify for any McIntosh Warranty. McIntosh does not warrant, in any way, products that are purchased
from anyone who is not an Authorized Dealer or products that have had their serial number altered or defaced.
MC402
Power Amplifier
EXCLUSIVE MCINTOSH POWER
ASSURANCE SYSTEM
A collection of technologies
that enhance performance
and reliability and protect
the amp and loudspeakers.
Power Guard
A waveform comparison circuit
continuously monitors both input
and output signals. If any
difference is detected, Power
Guard dynamically adjusts the
input level to ensure maximum
power output while preventing
harsh sounding clipping distortion.
Sentry Monitor
Current protection continually
senses the voltage and current of
the output stage and confines it to
a safe limit, without limiting
power output.
DC Failure Protection
Protects speakers against output
circuit failure. Any DC current that
appears in the output is shunted to
ground by the output autoformer.
Thermal Sensors
Protects against overheating if
cooling air is blocked and output
transistors become too hot.
Turn-on Delay
Delays operation for about two
seconds after turn-on, to silence
any pops or thumps generated by
other equipment.
Soft Start Inrush Protection
Eliminates component stress
during turn-on. Thermistors in the
power transformer act as a
cushion against inrush current.
Fully balanced differential design
400 watts (stereo) or 800 watts (mono parallel)
High output current capability (>100 amps)
Balanced and unbalanced inputs
Exclusive McIntosh Output Autoformer)
Wide power bandwidth, low distortion
Exclusive McIntosh Power Assurance System
Illuminated peak-responding, true-reading
watt meter with hold
Fiber optic light diffuser illumination for front panel
nomenclature
Remote power control
Massive gold-plated five-way output binding posts
Fanless convection cooling
Modular construction with stainless steel chassis
with super mirror finish
1/2"-thick glass front panel with illuminated nomenclature FREQUENCY RESPONSE
20Hz to 20kHz, +0 / -0.25dB
10Hz to 100kHz, +0 / -3.0dB
TOTAL HARMONIC DISTORTION
0.005% max. at any level from
250mW to rated power output
INTERMODULATION DISTORTION
SMPTE 0.005% maximum if
instantaneous peak output does
not exceed twice the output rating
A-WEIGHTED SIGNAL-TO-NOISE RATIO
Unbalanced: 94dB
(120dB below rated output)
Balanced: 98dB
(124dB below rated output)
RMS POWER OUTPUT
400W min. (stereo) or 800W min.
(mono) sine wave continuous
average power output from 20Hz-
20,000Hz
INPUT IMPEDANCE
10,000 ohms (unbalanced)
20,000 ohms (balanced)
OUTPUT LOAD IMPEDANCE
Terminals for 8, 4, or 2 ohms
(stereo)
Terminals for 1, 2, or 4 ohms
(mono)
INPUT SENSITIVITY
2.0V unbalanced
4.0V balanced
WIDE BAND DAMPING FACTOR
Greater than 40
DYNAMIC HEADROOM
2.1dB
RATED POWER BAND
20Hz to 20kHz
POWER GUARD&
Clipping is prevented and THDdoes
not exceed 2% with up to14dB
overdrive at 1kHz
POWER REQUIREMENTS
120V 50/60Hz, 10A
OVERALL DIMENSIONS (H X W X D)
17 1.2 (44.45 cm) x 9 7/16 (23.97
cm) x 20 (50.8 cm)
WEIGHT
110.5 lbs. (50.1kg) net
143.5 lbs. (65.1kg) boxed
12.02.MC402.20k.JCP 35005200
