McIntosh Black 3-Channel Power Amplifier - MC303
McIntosh MC303 3-Channel Power Amplifier in Black
The McIntosh MC303 is our most powerful multi-channel amplifier to date, providing 300 Watts into each of 3 channels. It features our renowned Autoformer™, which allows its full 300 Watts of power to be delivered into 2, 4 or 8 Ohm speakers with the lowest noise and distortion performance possible.
The MC303 was designed with the intent to drive a home theater’s front left, front right and center channels. As most of a movie’s soundtrack is delivered by these three channels, the powerful MC303 provides all the power needed for an amazing in-home theater experience. For surround channels, combine the MC303 with our MC312 or MC152 amplifiers and fully immerse yourself in your movie collection. For music lovers, the MC303 can be used in tri-amping configurations on compatible speakers, such as our XRT1.1K or XRT2.1K.
The MC303 shares many notable McIntosh technologies that are found in our other home audio and home theater products, including Power Guard® that prevents over-driving of the amplifier and the resulting harsh sounding clipping that could damage your speakers. Sentry Monitor™ is our fuse-less short-circuit protection circuit that disengages the output stage before current exceeds safe operating levels and then resets automatically when operating conditions return to normal. Inputs for both balanced cables and unbalanced cables are available to provide flexibility in connecting to the rest of your system. A triple bank of blue watt meters provides instant recognition of power output (the meters may be switched off for theater use if they conflict with the television or movie screen).
Aesthetically, the MC303 is every bit as McIntosh as any of our products. A polished stainless steel chassis, classic black glass front panel, knobs and custom machined aluminum handles all come standard. Contact your local dealer to learn more.
Features
- 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.
General
Warranty Information
Approximate Weight
Approximate Dimensions
Frequently Asked Questions
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This amplifier delivers 300 Watts RMS per channel across 3 channels, providing robust power suitable for driving front left, right, and center audio channels with exceptional clarity.
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Yes, it features exclusive Output Autoformers technology that allows full rated power delivery into 2, 4, or 8 Ohm speakers with minimal distortion, offering flexibility in speaker selection.
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The amplifier includes Power Guard technology to prevent clipping and distortion and Sentry Monitor for fuse-less short-circuit protection that automatically resets when safe operating conditions resume.
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It provides a frequency response from 20 Hz to 20,000 Hz (±0.25 dB), ensuring clear and accurate sound reproduction across the full audible spectrum.
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Yes, there is a triple bank of blue watt meters that display power output in real-time, which can be turned off during theater use to avoid screen distraction.

