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To experience the legendary performance of McIntosh, please call on us at\
1-800-538-6576 www.mcintoshlabs.com 35011400 MC303
MC303 THREE CHANNEL POWER AMPLIFIER
Power outPutMinimum 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 IMPedanCe2, 4 or 8 ohms
rated Power Band20Hz to 20,000Hz
totaL HarMonIC dIstortIon0.005% maximum harmonic distortion at any
power level from 250 milliwatts to rated power,
20Hz to 20,000Hz
dynaMIC HeadrooM1.8dB
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 dIstortIon0.005% 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 FaCtorGreater than 40
InPut IMPedanCe10,000 ohms
Power guardLess than 2% THD with up to 14dB overdrive
at 1,000Hz
Power ControL InPut5VDC - 12VDC
Power ControL outPut12VDC, 25mA maximum, delay 0.2 seconds
Power requIreMents100 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 dIMensIonsWidth 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
weIgHt155 lbs. (70.3 kg) net, 180 lbs. (81.6 kg)
in shipping carton
sHIPPIng Carton dIMensIonsWidth is 31" (78.74cm)
Depth is 28" (71.12cm)
Height is 17-1/4" (43.82cm)
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.
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.
