McIntosh Labs MC303 3-Channel Solid State Amplifier
Commanding yet refined, the MC303 delivers dead-silent backgrounds, authoritative bass and startling dynamic reach from each 300W channel. HomeTheaterHifi found its detailed, musical presentation equally compelling with stereo music and a demanding three-channel cinema front stage. Autoformer outputs add confident control across difficult speaker loads, while the illuminated meters complete a genuinely luxurious powerhouse.
WATT RECOMMENDS
Save your favorites. Compare them anytime.
Create a free HiFi Hub account to save products to your Wishlist and compare your favorites side by side.
Deliciously Crispy
Sound Quality
95/100
Build Quality
94/100
Value for Money
97/100
Pros
Exceptionally quiet, detailed and musical presentation with clean vocal purity and convincing instrumental separation.
Powerful, controlled bass and expansive dynamics handle demanding music and home-theater material with authority.
Autoformer-equipped 300W channels drive varied and difficult speaker loads confidently, supporting both stereo and three-channel use.
Robust protection systems, cool-running operation and exceptional build quality support long-term ownership.
Cons
The 155-pound chassis makes unboxing, moving and installation difficult without assistance.
WATT RECOMMENDS
Save your favorites. Compare them anytime.
Create a free HiFi Hub account to save products to your Wishlist and compare your favorites side by side.
What Reviewers Are Saying
SOUND QUALITY PERFORMANCE 95/100
The MC303 is described as exceptionally quiet, detailed and musical, while retaining the authority to make demanding material feel vivid and unconstrained. The review also praises its spatial precision, tonal purity and ability to bring out the highest sound quality the reviewer had heard from the associated Legacy speakers.
Transparency Resolution
95/100
The reviewer calls the MC303 as dead silent as any amplifier they have experienced, a strong indication of an exceptionally clean background. It is also described as wonderfully detailed, with vocal purity that lesser systems cannot approach.
Tonal Balance Musicality
94/100
The amplifier is described as both detailed and musical rather than merely analytical. Vocals remained pristine, brass had bite without harshness, and the reviewer found it delivered the highest overall sound quality they had heard through the partnered speakers.
Dynamics
96/100
The MC303 handled material with extreme dynamic contrasts, from soft passages that drew listeners in to crescendos that were startling. Drums arrived with authority, guitars had endless dynamics, and the amplifier handled everything the reviewer threw at it.
Soundstage Imaging
94/100
On choral material, singers were presented with proper spacing across the front of the stage. The reviewer also highlights a level of purity and image separation beyond that of lesser systems.
Assessments of Build Quality, Usability, and Overall Propositions.
Build Quality
94/100
The reviewer characterizes the 155-pound MC303 as an incredibly well-built beast. Its regulated power supply, Sentry Monitor and thermal protection, balanced inputs, output autoformers, illuminated power meters and robust three-channel architecture support that impression of serious engineering.
Value for Money
97/100
At $12,500 in the review, the MC303 was explicitly called a bargain when compared with quality power amplifiers costing more than $25,000 and, in some cases, into six figures. The reviewer regarded its sound, power delivery and appearance as unusually compelling for its market position.
Reviews & Sources
Professional reviews and sources for this product's Watt'n Potatoes analysis.
Online Reviews & Mentions
YouTube Reviews
Forum Mentions
No forum mentions found yet
Specifications
- FTC Power Output Rating
- 300 W
- Power Output per Channel
- 300 W into 2, 4 or 8 ohms
- Number of Channels
- 3
- Total Harmonic Distortion
- 0.005%
- S/N below rated output
- 112dB
- Dynamic Headroom
- 1.8dB
- Damping Factor
- >40
- Rated Power Band
- 20Hz to 20kHz
- Frequency Response
- +0, -0.25dB from 20Hz to 20kHz+0, -3dB from 10Hz to 100kHz
- Remote Power Control
- Yes
- Multi-Channel DB25 Cable
- No
- Circuit Configuration
- Push-Pull Complementary Autoformers
- Circuit Design
- Solid State
- Mono Bridge
- No
- Mono Parallel
- No
- Output Type
- Autoformer™
- Meters
- Yes
- Meter Light Switch
- Yes
- Balanced Input
- Yes
- Front Panel
- Glass with handles
- Illumination
- LED Fiber Optic
- Chassis Style
- Inverted
- Speaker Binding Post Type
- Yes
- Unit Dimensions (W x H x D)
- 17-3/4" (45.09cm) x 12-3/8" (31.43cm) (including feet) x 22" (55.88cm) (including front panel and cables)
- Unit Weight
- 155 lbs (70.3 kg)
- Shipping Weight
- 180 lbs(81.6 kg)
Manufacturer's Description — McIntosh Labs
- Type: Solid State
- 300 Watts x 3-Channels
- Autoformers™, Power Guard®, Sentry Monitor™
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.
Verified Dealers
Online Dealers
All Dealers
Zoom out the map to see more dealers
Authorized dealers for McIntosh Labs MC303 3-Channel Solid State Amplifier
- Absoulute Audio plus Video — in-store — Aiken, South Carolina, United States (website)
- Holt Hill — online and in-store — Andover, Massachusetts, United States (website)
- Resolution A/V — in-store — New York City, New York, United States (website)
- A Tube High Fidelity — online and in-store — Almere, Flevoland, Netherlands (website)
- Abt Electronics — online and in-store — Glenview, Illinois, United States (website)
- Acoustic Designs Inc. — in-store — Scottsdale, Arizona, United States (website)
- Advance Audio — in-store — Wichita, Kansas, United States (website)
- Ahead Stereo — in-store — Los Angeles, California, United States (website)
- Ajasom — online and in-store — Amadora, Lisboa, Portugal (website)
- Alen Audio — in-store — Extramurs, Comunidad Valenciana, Spain (website)
and 225 more verified dealers