At 300 watts per channel the new McIntosh MC303 Three Channel Power Amplifier

with Autoformers is our most powerful multi-channel amplifier offering to date. This

powerhouse is also the first ever multi-channel amplifier from McIntosh to include

Autoformer coupled output stages. The McIntosh Autoformer, a premium technology

found only on the best McIntosh designs, allows each channel of the MC303 to deliver

maximum power into 2, 4, or 8 ohm loads resulting in the lowest noise and distortion

performance possible. With available peak power of 1200 watts per channel, the

MC303 is ready to drive the finest loudspeakers to sound their very best.

Premium cosmetics featuring a ½” thick glass faceplate, custom machined and

anodized aluminum handles, and a mirror polished stainless steel chassis are

standard equipment on the MC303. Power Guard, a McIntosh circuit innovation,

maximizes sound quality at high power levels while our Sentry Monitor feature

provides continuous short circuit protection of the amplifier and connected

loudspeakers. A triple bank of Peak Reading Watt Meters provides instant

recognition of power output and may be switched off for theater use.

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.

OUTPUT AUTOFORMERS

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. 

SPECIFICATIONS

Power Output: Minimum sine wave continuous average power output per channel, all channels operating: 300 watts into a 2 ohm, 4 ohm or 8 ohm load

Output Load Impedance:  2, 4 or 8 ohms

Rated Power Band: 20Hz to 20,000Hz

Total Harmonic Distortion: 0.005% maximum harmonic distortion at any power level from 250 milliwatts to rated power, 20Hz to 20,000Hz

Dynamic Headroom: 1.8dB

Frequency Response: +0, -0.25dB from 20Hz to 20,000Hz / +0, -3dB from 10Hz to 100,000Hz

Input Sensitivity (for rated output): 1.7 Volt Unbalanced / 3.4 Volt Balanced

Signal To Noise Ratio (A-Weighted): 112dB below rated output

Intermodulation Distortion: 0.005% maximum, if the instantaneous peak power output does not exceed twice the rated power output for any combination of frequencies from 20Hz to 20,000Hz.

Wide Band Damping Factor: Greater than 40

Input Impedance: 10,000 ohms

Power Guard: Less than 2% THD with up to 14dB overdrive at 1,000Hz

Power Control Input: 5VDC - 12VDC

Power Control Output: 12VDC, 25mA maximum, delay 0.2 seconds

Power Requirements: 100 Volts, 50/60Hz at 12 Amps. 110 Volts, 50/60Hz at 11 Amps. 120 Volts, 50/60Hz at 10 Amps. 220 Volts, 50/60Hz at 6 Amps. 230 Volts, 50/60Hz at 6 Amps. 240 Volts, 50/60Hz at 6 Amps.

Standby: Less than 1 watt

Note: Refer to the rear panel of the MC303 for the correct voltage.

Overall Dimensions: Width is 17-3/4" (45.09cm), Height is 12-3/8" (31.43cm) including feet, Depth is 22" (55.88cm) including the Front Panel and Cables.

Weight: 155 lbs. (70.3 kg) net, 180 lbs. (81.6 kg) in shipping carton

Shipping Carton Dimensions: Width is 31" (78.74cm), Depth is 28" (71.12cm), Height is 17-1/4" (43.82cm)

FOR THE CONSUMER’S PROTECTION

In order to ensure the highest level of customer satisfaction, “new” McIntosh

products may only be purchased over-the[1]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