McIntosh Labs MC275 2-Channel Vacuum Tube Amplifier
The MC275 pairs richly detailed tube tone with an expansive soundstage, clean imaging and remarkably effortless drive. Home Theater Review found its presentation inviting and free of harshness, while its Unity Coupled design, multiple output taps and bridgeable 150W mono mode add serious system flexibility. It is a beautifully engineered classic for listeners who prize natural musical flow and polished authority.
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Deliciously Crispy
Sound Quality
91/100
Build Quality
94/100
Value for Money
91/100
Pros
Rich, inviting and smooth sound with no harshness or stridency, plus strong tonal balance.
Expansive soundstage and excellent imaging bring air and spatial focus to recordings.
Flexible power delivery: 75W per channel across speaker taps, with bridge/parallel-mono capability for greater authority.
Exceptional construction, including a substantial chassis, ceramic tube sockets and heavy transformers.
Cons
Ultimate upper-midrange and treble resolution are not at the state-of-the-art level.
Low-frequency authority and articulation can be surpassed by more powerful amplifiers, particularly with demanding speakers.
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What Reviewers Are Saying
SOUND QUALITY PERFORMANCE 91/100
Reviewers find the MC275 unusually musical, polished and inviting, combining tube warmth with notably clean, stable presentation. Its strongest suit is natural tone and an effortless sense of flow; ultimate treble resolution and deep-bass authority are the more qualified areas.
Transparency Resolution
89/100
The MC275 is described as richly detailed, pristine and free of harshness, with lower-noise circuitry supporting a clean presentation. Home Theater Review nevertheless found it short of the very best in upper-midrange and treble resolution, so it is more revealing than analytical.
Tonal Balance Musicality
94/100
This is the amplifier's most consistently praised quality. Reviewers describe a smooth bass-to-treble balance, truthful timbre, warmly enveloping tone and a human, emotionally engaging musicality without stridency.
Dynamics
90/100
Reviewers call the presentation powerful, dynamic and effortless even at loud levels, with substantial control and bass extension. Its measured output exceeds the conservative 75W rating, although one review notes that larger high-end amplifiers can deliver greater low-frequency authority and articulation.
Soundstage Imaging
90/100
The MC275 produces an expansive soundstage with excellent imaging and the air around performers often associated with strong tube designs. Imaging is praised as precise, though one reviewer did not consider its lateral and vertical image scale state of the art.
Assessments of Build Quality, Usability, and Overall Propositions.
Build Quality
94/100
Reviewers specifically praise the extremely high standard of US-made construction, including the polished stainless-steel chassis, ceramic sockets, heavy transformers, quality input hardware and substantial binding posts. The Unity Coupled transformer design, balanced input, remote power control, selectable speaker taps, bridge/parallel-mono capability and cooling provisions make this a thoroughly engineered amplifier rather than merely a handsome one.
Value for Money
91/100
At roughly $7,500-$9,780, the MC275 is a premium-priced tube amplifier rather than an inexpensive route to high power. Reviewers nonetheless say its sound and styling justify the asking price and call it a great value; against competing high-end tube and solid-state amplifiers, buyers should weigh its exceptional musicality and finish against rivals that can offer more bass authority or output for similar money.
Reviews & Sources
Professional reviews and sources for this product's Watt'n Potatoes analysis.
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Specifications
- FTC Power Output Rating
- 75 W
- Power Output per Channel
- 75 W into 4, 8 or 16 ohms
- Number of Channels
- 2
- Total Harmonic Distortion
- 0.5% maximum harmonic distortion at any power level from 250 milliwatts to rated power, 20Hz to 20kHz(≤ 0.25% harmonic distortion at 1kHz)
- S/N below rated output
- 105dB
- Dynamic Headroom
- 1.2dB
- Damping Factor
- >22
- Rated Power Band
- 20Hz to 20kHz
- Frequency Response
- +0, -0.5dB from 20Hz to 20kHz+0, -3.0dB from 10Hz to 100kHz
- Remote Power Control
- Yes, input and output
- Multi-Channel DB25 Cable
- N/A
- Circuit Configuration
- Unity Coupled
- Circuit Design
- Vacuum Tube
- Mono Bridge
- Yes
- Mono Parallel
- Yes, 150W @ 2, 4 or 8 Ohms
- Output Type
- Unity Coupled Output Transformer
- Meters
- No
- Meter Light Switch
- Small signal tubes LEDs controlled by McIntosh preamp
- Balanced Input
- Yes
- Front Panel
- N/A
- Illumination
- Small Signal Tubes, LED
- Chassis Style
- Polished Stainless Steel
- Speaker Binding Post Type
- Patented Solid Cinch™ Speaker Binding Posts
- Unit Dimensions (W x H x D)
- 16-1/2" (41.9cm) x 8-1/2" (21.6cm) x 12" (30.5cm)
- Unit Weight
- 67 lbs (30.5 kg)
- Shipping Weight
- 75 lbs (34.1 kg)
Manufacturer's Description — McIntosh Labs
- Type: Vacuum Tube
- 75 Watts x 2-Channels or 150 Watts x 1-Channel
- Unity Coupled Circuit Output Transformers
- Sentry Monitor™, Solid Cinch™ speaker binding posts
- One of the most iconic amplifiers ever made
Upon its initial release in 1961, the MC275 Vacuum Tube Amplifier became an instant favorite due to its ability to drive the power-hungry speakers of that time period with great power at low distortion levels. However, as transistors emerged and vacuum tubes became 'old technology,' the MC275 was discontinued in 1971. Thankfully, that is not where the story of the MC275 ends.
It came back into production as a special commemoration edition in 1993 to posthumously honor McIntosh co-founder and longtime president Gordon Gow. The reincarnated MC275 received incredibly high acclaim and earned its spot back in the product lineup. The overall storyline behind the MC275 and its history with McIntosh is exceptionally rich and it has been the driving force behind countless home audio systems for decades. It is hard to imagine McIntosh without the MC275.
Now in its sixth generation, the MC275 has many subtle enhancements from the previous releases that have greatly improved performance. Combined with the widest bandwidth McIntosh output transformer design, the MC275 features tauter bass control and thermally quiet circuit design. The result is pure music. This vacuum tube power amplifier has all the features to meet the needs of today’s music enthusiast, while preserving the qualities that have made the MC275 the most revered McIntosh vacuum tube amplifier.
The MC275 can be used in either stereo or mono mode. When used as a stereo amplifier, it will deliver 75 Watts per channel to 4, 8 or 16 Ohm speakers; in mono mode it will output 150 Watts to a single speaker with an impedance of 2, 4 or 8 Ohms. The MC275's full power can be delivered regardless of the speaker impedance thanks to our patented Unity Coupled Circuit output transformer technology – the same technology McIntosh was founded on in 1949. The two Unity Coupled Circuit output transformers are located next to the power transformer.
Four KT88 vacuum tubes power the output section while four 12AT7 and three 12AX7A smaller vacuum tubes are used for the Input, Voltage, and Driver amps. The MC275 offers both balanced and unbalanced inputs to connect to your preamplifier and home audio system. It comes with our fuse-less Sentry Monitor short-circuit protection that disengages the output stage before current exceeds safe operating levels and then resets automatically when operating conditions return to normal. Our patented gold-plated Solid Cinch speaker binding posts assure the best connection to all speaker cables
The seven small tubes are LED illuminated to indicate the amplifiers functional status: upon power up, they sequentially glow amber for a few seconds and then all turn green to signify system readiness. In the rare case of an output tube failure, the small tube(s) in front of it will turn red to notify you of the problem. An input and output for our Power Control technology allows other connected McIntosh components, such as preamplifiersCD playersturntables, or media steamers, to automatically turn on and off. Contact your local dealer to learn more.
Verified Dealers
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Authorized dealers for McIntosh Labs MC275 2-Channel Vacuum Tube 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