Page 2 of MC402 Power Amplifier by McIntosh Laboratory, Inc.

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 consumer s 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 12.02.mc402.20k.jcp 35005200 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 20hz20,000hz 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 thd does not exceed 2 with up to14db overdrive at 1khz power requirements 120v 50/60hz 10a overall dimensions h xwxd 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 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

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