McIntosh MC-303 Brochure

MC303

legendary

THREE CHANNEL POWER AMPLIFIER

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.

“...our most powerful
multichannel amplifier
offering to date.”

Three 300 Watt Channels

Output Autoformers

60 Amps Output Current

Large Gold Plated Five-Way
Binding Posts

MC303

THREE CHANNEL POWER AMPLIFIER

eXCLusIve MCIntosH
Power assuranCe systeM

A collection of technologies that
enhance performance and reliability
while protecting the amplifier and
loudspeakers.

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)

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.

For tHe ConsuMer’s
ProteCtIon

In order to ensure the highest level of
customer satisfaction, “new” McIntosh
products may only be purchased over-the­counter 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.

To experience the legendary performance of McIntosh, please call on us at 1-800-538-6576

35011400 MC303

www.mcintoshlabs.com