McIntosh MC402
Producing a minimum 400 watts per channel in stereo, 800 watts in mono, the MC402 delivers power that is fully balanced from input to speaker output. The extraordinary quad-differential design of the MC402 actually consists of four complete amplifier circuits. Each channel contains two amplifier circuits, each the mirror image of the other, whose outputs are combined in the unique McIntosh Output Autoformer® resulting in totally balanced operation from input to speaker output and the cancellation of virtually all noise and distortion.
The exclusive McIntosh Output Autoformer® is a handcrafted matching device that provides an ideal impedance match for all speaker types regardless of their rated impedance. Any departure from an optimum impedance match increases stress on the amplifier which threatens a rise in distortion as well as a reduction in the life expectancy of the amplifier. McIntosh Output Autoformers® enable the MC402 to operate at maximum efficiency and to always deliver full power, without stress, to any type of loudspeaker.
Exclusive McIntosh
Power Assurance System - A collection of technologies that enhance performance and reliability while protecting the amplifier and loudspeakers.
Power Guard - A waveform comparison circuit continuously monitors both input and output signals. Power Guard dynamically adjusts the input level to avoid clipping while preventing harsh sounding distortion.
Sentry Monitor - Fuse-less short-circuit protection circuit disengages the output stage before current exceeds safe operating level – resets automatically.
Thermal Sensors - Protects against overheating if cooling air is blocked and output transistors become too hot.
DC Failure Protection - Protects speaker against output circuit failure. Any DC current that appears in the output is shunted to ground by the output autoformer.
Exclusive Double Balanced Circuity - Each channel of the MC402 consists of two balanced power amplifiers operating in push-pull with their outputs combined in a McIntosh Autoformer. This double balanced configuration from input to output cancels virtually all distortion
Output Autoformer - Unique McIntosh technology delivers the full rated amplifier output with the least possible distortion into loudspeaker impedances of 2, 4, or 8 Ohms; you get all the power you paid for and the freedom to choose any loudspeaker.
Wattmeter - Swift, accurate response reveals program peaks so staying within the power limits of your loudspeakers is easy.
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. Theristors in the power transformer act as a cushion against inrush current
Balanced and Unbalanced Inputs
Balanced connections guard against induced noise and al-
low long cable runs without compromising sound quality.
Illuminated Power Meters - The Illuminated Power Output Watt Meters on the MC402 are peak responding, and indicate the true power output of the amplifier. The Peak Watt Hold Mode allows the meters to temporarily stay at the highest power output and then slowly decay. The Front Panel Meter Illumination may be switched Off at any time.
Fiber Optic Solid State Front Panel Illumination The Illumination of the Front Panel is accomplished by the combination of custom designed Fiber Optic Light Diffusers and Light Emitting Diodes (LEDs). This provides even Front Panel Illumination, together with the extremely long life LEDs.
Glass Front Panel and Super Mirror Chassis Finish - The famous McIntosh Illuminated Glass Front Panel with a three dimensional look and the Stainless Steel Chassis with Super Mirror Finish ensures the pristine beauty of the MC402 will be retained for many years
Specifications
Frequency Response:
20 Hz to 20 kHz, +0 / -0,25 dB
10 Hz to 100 kHz, +0 / -3,0 dB
Total Harmonic Distortion: : 0.005% max. at any level from 250 mW to rated power output
Intermodulation Distortion (SMPTE): 0.005% maximum if instantaneous peak output does not exceed twice the output rating
Signal-to-Noise-Ratio: (A-Weighted )
Unbalanced : 94 dB (120 dB below rated output)
Balanced : 98 dB (124 dB below rated output)
Power Output RMS (sine wave continuous average power output from 20 Hz-20,000 Hz)
Stereo : 400 W min.
Mono : 800 W min.
Input Impedance
Unbalanced : 10,000 Ω
Balanced : 20,000 Ω
Output Load Impedance
Stereo : Terminals for 8, 4, or 2 Ω
Mono : Terminals for 1, 2, or 4 Ω
Input Sensitivity:
Unbalanced : 2,0 V,
Balanced : 4,0 V
Wide Band Damping Factor: Greater than 40
Dynamic Headroom: 2,1 dB
Rated Power Band: 20 Hz to 20 kHz
Power Guard: Clipping is prevented and THD does not exceed 2% with up to 14 dB overdrive at 1 kHz
Power Requirements: 120V 50/60Hz, 10A
Dimensions (H X W X D): 444,5 x 239,7 x 508 mm (17-1/2" x 9-7/16" x 20")
Weight: 50.1kg (110,5 lbs. net); 5,1 kg (143,5 lbs. boxed)
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