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ATC SCM25A Mk2 6.5-inch 3-way Powered Studio Monitor

235W Tri-amped Powered Studio Monitor with 6.5" Woofer, 3" Midrange, 1" Tweeter, Bass Boost, Input Trim, and Overload Protection (Pair)
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Item ID: SCM25AMk2
ATC SCM25A Mk2 6.5-inch 3-way Powered Studio Monitor
Price:$9,990 and 00 cents
Special Financing - Ends Aug 2, 2026. $278/month with 36 month financing*

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ATC SCM25A Mk2 6.5-inch 3-way Powered Studio Monitor
In Stock!
Price:$9,990 and 00 cents
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Handmade Studio Monitors from the UK

Handcrafted in the UK, The ATC SCM25A Mk2 is a premium active studio monitor with lots to offer. This speaker boasts ATC's proprietary dual-suspension drivers, which include a 6.5-inch short-coil low-frequency driver, a 3-inch soft-dome midrange driver, and a 1-inch soft-dome tweeter. This studio monitor reproduces the 47Hz–22kHz frequency range with the utmost accuracy and clarity, and its tri-amped design, which features an integrated 235-watt Class AB amplifier, delivers an impressive 109dB SPL. The SCM25A Mk2 vaunts a cutting-edge ported enclosure for thunderous bass reproduction and a foam port bung to reduce low-frequency output in smaller listening spaces. You also get bass boost and trim controls, plus overload protection. Hear what you have been missing from your mixes with the ATC SCM25A Mk2.

ATC's proprietary handcrafted drivers

The SCM25A Mk2 comes loaded with ATC's proprietary dual-suspension drivers, all handmade and wound to exacting specifications for playback that's as accurate as possible. This powered studio monitor's 6.5-inch, short-coil low-frequency driver features a carbon-paper cone. Its 3-inch, soft-dome midrange driver tackles the 380Hz–3.5kHz frequency range. The SCM25A Mk2 also includes a 1-inch, soft-dome high-frequency driver. This tri-amplified monitor delivers 150 watts to the woofer, 60 watts to the midrange driver, and 25 watts to the tweeter. ATC's renowned low-distortion technology, apparent throughout the speaker, includes a fourth-order critically damped, phase-compensated crossover and a passively cooled, FET-limited amplifier block.

Easily tailor the speaker to your room

The audio engineers here at Sweetwater are impressed by how easy it is to tailor the ATC SCM25A Mk2 to your listening space. This studio monitor not only includes a continuously variable +6dB bass boost at 40Hz, but also a continuously variable -6dB input trim, for dead-simple low-frequency control and gain-staging. The SCM25A Mk2 also comes with a foam port bung, enabling you to attenuate the speaker's low-frequency output in smaller rooms. The port bung provides -1.5dB of attenuation, centered around 80Hz, while the monitor's output below 45Hz increases by approximately 1dB.

The legacy of ATC monitors

A young engineer named Billy Woodman spent his formative years working side by side with some of the best speaker engineers of the day. In 1974, Woodman went on to found ATC (Acoustic Transducer Company). Since then, ATC has focused on one thing: creating the most accurate monitor loudspeakers possible. If you want to make great-sounding recordings that translate to the world outside your studio, accurate monitoring is a must. You need to hear every nuance of your audio, exactly as it was recorded and mixed. ATC monitoring equipment, expertly engineered with the highest-grade components, is designed to do provide just that. How good are ATC monitors? Just ask renowned producers and engineers like George Massenburg, Chuck Ainlay, Nathaniel Kunkel, and Doug Sax. You’ll also find ATC monitors in Abbey Road Studios, Sony Studios New York, Blackbird Studios Nashville, and many more world-class facilities. Sweetwater is proud to offer you ATC’s extensive range of professional studio monitors.

ATC SCM25A Mk2 6.5-inch 3-way Powered Studio Monitor:

  • Loaded with ATC's proprietary handmade dual-suspension drivers
  • 6.5-inch short-coil low-frequency driver; 3-inch soft-dome midrange driver; 1-inch soft-dome tweeter
  • Reproduces the 47Hz–22kHz frequency range with the utmost accuracy and clarity
  • 235W, tri-amped Class AB design delivers an impressive 109dB SPL
  • 4th-order critically damped, phase-compensated crossover and a passively cooled, FET-limited amplifier block
  • Continuously variable +6dB bass boost at 40Hz provides precise low-frequency control
  • Continuously variable -6dB input trim supplies easy gain-staging
  • Cutting-edge ported enclosure ensures thunderous bass reproduction
  • Foam port bung reduces low-frequency output in smaller listening spaces
  • FET active momentary gain reduction overload/clip protection

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Tech Specs

  • Powered: Yes
  • Power Configuration: Tri-amped
  • Quantity: Pair
  • LF Driver Size: 6.5"
  • LF Driver Type: ATC Proprietary Short-coil
  • MF Driver Size: 3"
  • MF Driver Type: Soft Dome
  • HF Driver Size: 1"
  • HF Driver Type: Soft Dome Tweeter
  • LF Driver Power Amp: 150W
  • MF Driver Power Amp: 60W
  • HF Driver Power Amp: 25W
  • Total Power: 235W
  • Frequency Response: 47Hz-22kHz
  • Crossover Frequency: 380Hz, 3.5kHz
  • Maximum Peak SPL: 109dB @ 1m
  • Input Types: 1 x XLR
  • Output Types: 1 x XLR, 1 x 1/8" (headphones), 1 x Coax (S/PDIF)
  • Features: Bass Boost, Overload Protection
  • Enclosure Type: Side Ported
  • Power Source: Standard IEC AC Cable
  • Height: 10.4"
  • Width: 16.9"
  • Depth: 14.5"
  • Weight: 53.79lbs (per cabinet)
  • Manufacturer Part Number: SCM25A Mk2

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Reviews

The perfect monitor for my small room.
I've used ATC's starting 10 years ago in various studios. My intro to the line was ATC SCM20's & 150's when I was an assistant. I really learned to know that sound. It wasn't always pretty, but they made you work hard. Got into passive monitors when I went independent and eventually came to the point where I wanted to push things harder and I wanted a rig that would tell me with confidence where the boundaries are. Felt like I had always been missing a couple crucial areas because my passives were letting me gloss over those details.

Anyway, a couple friends in town have 25's and 45's. They were gracious enough to let me spend some time listening & working on their speakers. The sound of the 25 is like an old friend to me. Revealing in a brutal way, yet really really musical. They don't force me in a direction, but they DO push me to make good decisions. And they make it obvious. That midrange dome reveals distortion & artifacts so well, it's wild.

They ARE very sensitive to placement. You need to take the time to work on that to get the most out of these monitors. In my opinion, they sound a lot better free standing than on a meter bridge or desk (like most monitors).

I'd be fine using them without a sub in my small room, but I'm still running (2) Rythmik F12G servo subs & DIRAC to get that last octave or two.

My clients have never been happier. I've never been happier. I'm getting little/no notes on first passes, mixes sound great in the car and I've got more time to hang out with my wife.

Thanks to Anthony Giraldi for hooking this up as always! You're my dude as long as I'm still buying gear.
Music background: engineer/mixer
Authentic across all frequencies!
I have been mixing on NS10MS for 25 years and know them like the back of my hand. Even with a sub, I feel like I have always had a little bit of 'guess work' in the low end. The ATC25s take all the guess work out of the mix. They expose everything! Which is just what we want.

It's funny to me when people say the ATCs sound amazing. I wouldn't say that... I would say they are truly authentic and expose your mix. There is nothing to hide behind in these monitors. They will force you to become better. I love them and so glad I made the choice to make these my #1 mixing monitors.
Music background: Career Producer & Musician
So far - very impressed with ATC quality
I run a private in home studio. I used Mackie HR824s since they were first introduced along with the ubiquitous Yamaha NS10's for mixing. I recently went with the ATC SCM25A Mk2 to replace the Mackie's. First, I have to say that the Mackie's are really good for the price and they served me well through many mixing sessions. But the ATC 25's are so crisp and transparent that I can see making even better mixes happen with better translation. The midrange on ATC speakers really stands out as expected. The ported cabinet yields about the right low end for my taste (I do not use a subwoofer) and the highs, well they are there, nicely smooth and crisp, and that's more than I can say for the Mackie's. I always felt that the Mackie's high end was a bit attenuated due the design of the tweeter and the crossover frequency used.
Great Speakers
With these speakers you literally feel like you could reach out and touch the sound coming out of them.
Music background: Audio engineer
MK IIs Excellent update!
I know MKI users want to maintain the value of the monitor, I won't sell mine but when looking for another pair, we put the MK IIs in the same room. Side by side in real time, they are identical, invisible if it weren't for the touch more silk and clarity in the top end. The new tweeter is exceptional! Well done ATC.
Music background: Professional Audio Engineer