Inside the McIntosh MA2375 Integrated Amplifier

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Ask any tube amplifier enthusiast to name the most revered power amp ever built, and there's a good chance they'll say the McIntosh MC275. Now that same power stage sits at the heart of McIntosh's newest integrated amplifier, the MA2375 — paired with a tube preamp, a five-band equalizer, and a phono section that puts most $10,000 standalone units to shame. Here's a closer look at what McIntosh packed into one chassis.

Two Amps in One: The Tube Preamp Meets the MC275 Power Stage

The MA2375 combines a tube preamp stage with essentially McIntosh's famous MC275 power amplifier — the most revered power amp any company has ever made. Add in a five-band equalizer, and you get a lot of flexibility, ample power, and tremendous user-friendliness all in one package.

Every signal running through the MA2375 passes through that tube preamp stage, so you get the smoothness tubes are known for no matter what source you're listening to. That includes headphones — McIntosh built in a high-drive headphone amplifier that also runs through the tubes, so you get that same warmth paired with genuine dynamics and drive.

Power meters on the front panel let you watch your output in real time. The MA2375 is officially rated at 75W per channel, but that's a conservative number — it'll actually put out closer to 90W per channel, and that's continuous power across the entire audible spectrum with under half a percent distortion.

Summary:

• Combines a tube preamp stage with McIntosh's revered MC275 power amp design
• Every signal — including headphone output — runs through the tube stage
• Rated at 75W per channel, but delivers closer to 90W with under 0.5% distortion

One Remote, Every McIntosh Component

An IR remote comes standard with the MA2375, and it does more than just run the amp. If you own other McIntosh gear — a CD player, a Blu-ray player, a streamer — this same remote handles the basic functions of those too. You really only need the one remote for your whole system.

Powering the unit on and off is as simple as tapping the volume knob. Since this is a tube amp, there's a brief warm-up period, and the front display keeps you posted on where things stand: the tubes glow orange while warming up, then the under-lighting switches to green once you're ready for music. If the under-lighting isn't your style, it can be switched off entirely from the setup menu.

Summary:

• One included remote can control other compatible McIntosh components
• Power on/off with a tap of the volume knob; display shows warm-up status
• Under-lighting can be turned off in the setup menu if preferred

Dialing In Your Sound: The Five-Band Equalizer, Trim, and Setup Menus

The MA2375's five-band equalizer gives you real control over the character of your music. Take an older, rawer recording — something like Diamonds and Rust, an album from the '70s that was miked in an almost raspy way. Turn up the deep bass control and the vocal suddenly gains body — she's singing from the stomach instead of the throat, as a chorus director might put it.

The 500Hz band covers the voice range specifically. Struggling to understand the dialogue in a British film? Turn it up. Want the vocals to recede a bit so you can sing along instead? Turn it down. The 2kHz control governs presence — turn it up and you feel closer to the performers; turn it down and the music recedes into the background, which is handy if you're hosting a party and want the music to stay out of the way of conversation. Last is the 10kHz band, which controls the sparkle or brightness of the sound.

Tapping the left knob opens the trim menu, where you can turn the equalizer on and off, adjust channel balance, and fine-tune the phono section. Press and hold that same knob and you'll enter the setup menu, which lets you rename any input — so unbalanced input three can become "cassette deck," for example — and hide inputs you're not using from the selector entirely.

Summary:

• Five-band EQ shapes deep bass, voice range (500Hz), presence (2kHz), and brightness (10kHz)
• Trim menu handles EQ on/off, channel balance, and phono fine-tuning
• Setup menu lets you rename and hide inputs you don't use

Speaker Connections Built for Any System

Flip the MA2375 around and the back panel reveals McIntosh's patented Solid Cinch speaker terminals. Loosen the top section to expose a hole for bare wire or a spade lug, or tighten it down for a banana plug. The barrel is free-wheeling, meaning if your speaker wire ever gets pulled or tugged, the connector itself won't loosen — only the barrel turns, keeping tension and a solid connection intact.

You'll notice four terminals per channel instead of two: one negative and three positive, labeled 4, 8, and 16 ohms. That's because every speaker has a specific impedance printed on its back panel, and amplifiers are optimized to deliver full power at a matched impedance. Connect a mismatched speaker to an amp without separate taps, and there's roughly a one-in-three chance you're not getting the power you paid for — in some cases as little as a quarter of it.

Modern speakers will typically use the 4 or 8 ohm connections, which deliver the amp's full rated 75W per channel. The 16 ohm tap is there for vintage speaker collectors — plenty of speakers from the 1950s and early '60s were built at 16 ohms, and without a dedicated tap for that impedance, you'd only be getting about half the power you paid for.

Summary:

• Patented Solid Cinch terminals accept bare wire, spade lugs, or banana plugs
• Dedicated 4, 8, and 16 ohm taps per channel ensure your speakers get full rated power
• The 16 ohm tap is built specifically for vintage speaker collections

Inputs, Outputs, and Multi-Room Listening

On the input side, the MA2375 offers two balanced XLR inputs — worth using whenever your source supports them, since balanced connections are virtually immune to noise pickup along the cable, and McIntosh has put real engineering effort into keeping this amp's noise floor low. There are also three pairs of unbalanced inputs, ideal for an FM tuner, a streamer, or a CD player.

A second set of preamp outputs (Output 2) opens up some flexible options. Run a pair of subwoofers off of it, connect a larger amplifier down the road if you move into a bigger space, or do what many owners do and power a second zone entirely — a set of kitchen speakers on their own amplifier, for instance. The front panel lets you control Output 1 and Output 2 independently, so you can play music in either room, or both at once. There's also a dedicated single-subwoofer output for the more common one-sub setup.

Summary:

• Two balanced XLR inputs plus three pairs of unbalanced inputs cover most sources
• A second preamp output (Output 2) enables dual subs, a second amp, or a whole second zone
• Output 1 and Output 2 are controlled independently from the front panel

The Universal Phono Section: A High-End Feature for Vinyl Lovers

For a lot of owners, the phono section is going to be the star of this amplifier. The MA2375 supports moving magnet and moving coil cartridges, including both high-output and low-output moving coil designs — essentially any phono cartridge you'd want to run.

Every cartridge performs best into a specific load: an ideal impedance, a target capacitance that tunes the high frequencies, and its own gain requirement. McIntosh's universal phono section lets you fine-tune all three — gain, resistance, and capacitance — right from your listening chair using the remote, with live results shown on the front display while the music is playing. It's a feature that most $10,000 standalone phono preamps don't even offer.

Summary:

• Supports moving magnet and both high- and low-output moving coil cartridges
• Gain, resistance, and capacitance are all remote-adjustable from your listening chair
• Live tuning results display on the front panel while music plays

Conclusion

Put it all together and the MA2375 is, in essence, a McIntosh MC275 power amp, a McIntosh tube preamp, a five-band equalizer, a subwoofer-ready output stage, and a genuinely great headphone amplifier — all built into one beautiful, compact package. Browse McIntosh's full lineup of amplifiers and components at World Wide Stereo, or stop by our Wayne, PA showroom to hear the MA2375 for yourself.

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McIntosh

MA2375 Integrated Amplifier

$15,000.00

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