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ATC Loudspeakers SCM45A Pro Compact Active 3-Way Monitor - Pair

High-performance 3-way compact active loudspeaker equipped with a custom-designed 3” mid-range driver for added clarity in the midrange plus two 6” bass drivers, a unique 1” dual-suspension tweeter, and three dedicated amps to accurately recreate audio signals


Product Description

ATC made history with their innovative SCM Series, which were the first studio monitors to integrate a custom-designed 3” mid-range driver for added clarity in the midrange. The ATC SCM45A Pro also features two 6” bass drivers, a unique 1” dual-suspension tweeter, and three dedicated amps to accurately recreate audio signals at high levels with minimal distortion.


The SCM45A Pro is a mid-sized high-performance studio monitor featuring a 1″ dual-suspension ’S-Spec’ tweeter, a hand-built 3” soft dome mid driver, and two hand-built 7˝ carbon-paper cone bass drivers. The built-in discrete MOSFET class A/B tri-amp feature 150 W, 60 W and 25 W of continuous power output for high-output performance. Designed specifically for critical near-field listening, LCR surround monitoring, and full surround channel support, the SCM45A Pros are perfect for mixing music or film.


Unlike most studio monitors, the SCM Series monitors aren’t going to make your music sound better—they’re going to point out every little flaw in your mix, and that’s the point. Hi-fi speakers are great for listening to records, but when you’re actually making records you need a neutral monitor that reveals as much information as possible.

Speakers with hyped lows and highs cause engineers to create inverse mixes that are weak and dull. Because SCM Series monitors offer a flat, neutral frequency response, you can make more informed decisions and create better mixes faster.

Most two-way speakers place the crossover frequency between 1.5 kHz and 2 kHz which often creates an unbalanced midrange, resulting in a lack of clarity. ATC SCM Series monitors feature a custom 3” driver that focuses on 380 Hz - 3.5 kHz, allowing you to monitor your midrange with more accuracy.


The ATC SCM Series offers high-performance in the most compact form factor possible. While SCM Series monitors are right at home sitting on the meter bridge in a recording studio, they’re equally at home in many other settings, such as post-production houses or rack-mounted in broadcast studios.


  • Mid-size very high performance active 3-way studio monitor
  • Custom-designed 3” mid-range driver for added clarity in the midrange
  • Ideally suited for: critical near-field listening applications in all control rooms; LCR surround monitoring in medium control rooms; Surround channels in medium-to-large control rooms
  • ATC hand built 6.5˝/164 mm carbon-paper cone bass driver
  • ATC 25 mm/1” Dual Suspension Super Tweeter
  • Discrete MOSFET class A/B bi-amp pack with 150/60/25 W continuous power output

Product Specifications

Condition New
Width 23.6 in
Depth 14.8 in
Height 13.9 in
Unit Weight 79.2 lb
Active or Passive Active
Monitor Application Mid-Field
Speaker Configuration Three-Way
Driver Sizes HF: 1″ dual-suspension ‘S-spec’ / MF: 3″ soft dome / LF: 6.5″ short-coil carbon paper cone
Number of Speakers Pair
Input Connectors Analog XLR
Amp Wattage Bass: 150 W RMS / Mid: 60 W RMS / High: 25 W RMS
Impedance Input: >10 kOhms balanced
Frequency Range 42 Hz - 25 kHz
Max. SPL 112 dB @ 1 m

Product Reviews

4.9 out of 5 stars.
Review Count (10)

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Love these things. First major purchase I’ve ever made where I’ve had 0 buyer’s remorse. Spent almost a decade looking for my ‘forever speakers,’ was real close to buying a couple different ones, glad I held out. These are the first speakers where I felt like I wasn’t making a compromise in any area. Really great midrange, but what ultimately sold me was the top end. The newer tweeter really makes that much of a difference between these and the scm25. Been a ProAc/Bryston guy for 15 years, been nominated for some Grammys for work I’ve done on my ProAcs, the day these arrived, I took my ProAcs down, and haven’t once thought about putting them back up. The stereo image is ridiculous, and the way these seem to effortlessly sound great even when I’m not in the ‘sweet spot,’ continues to impress.

By Lowell R on November 23, 2022

I've had the pleasure of working on some of the finest speaker monitors in the recording business, i.e Yamaha, JBL, Adam, Tannoy, Westlake, B & W just to name a few. I did extensive research when it became time to chose my dream speakers but most importantly, I took time to listen to everything. The ATC SCM45As are the most accurate and natural sounding monitor I've ever heard. I thought it was a cute tagline when the makers of the ATCs stated, "You can't unhear these speakers.". . . He was right. You simply can't!!

By MC B on April 18, 2022

It's like I'm hearing music for the first time. Great speakers for the money.

By Federico B on November 30, 2020

These speakers are worth it! Try these out before buying anything else, at the very LEAST they're worth a listen when trying to figure out your next set of speakers. I dig the clarity and musicality of these speakers better than any Barefoots for sure. Don't have too much experience with other high-end brands. All my mixes are translating better, and I can easily hear any movement I make in a mix. GET EM I DARE YOU!

By chris p on May 6, 2020

Love the speakers, definitely changed the way I work.

By Daniel G on October 21, 2019

I would give'm 5 stars... but I don't know how the best speakers in the world sound like. My life has gotten a lot easier since I got these speakers. I have spoken to the doctor about the constant hard on I've had since I got them. I don't know what kind of black magic these brits used. It's mysterious. The stereo image is uncanny. I love them with all my heart. I have never been happier. Cheers

By Halldor B on September 18, 2019

Incredible monitors - best in their price range by a long shot imo. Accuracy, power, clarity and inspiration. Film music, pop, classical, it doesn’t matter, the music is accurately represented.

By Ben Z on January 24, 2019

Expensive but worth it

By Mr. 4 on December 23, 2018

They have what I believe to be the finest midrange driver on the planet. And now with the first Tweeter without ferrofluid it's a winning combination for a long-lasting set of monitors. Ruthlessly revealing they will let you know when you have a great recording and also when you don't. Not cheap but highly recommended be sure to get heavy duty stands and a strong friend to help you put them on.

By Orchard R on November 7, 2018

Amazing bass response! Nice dynamic range. These have become my goto for critical listening during mix down. Expensive, but I am hooked.

By Michael on May 2, 2016

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How do you rate this product?
I would like to thank VK for the wonderful sales assistance, service and prices. This was my first purchase with you and it won't be my last. I only wish I'd discovered you years ago!
Matthew R.
I had two Grammy wins this year - Ray LaMontagne & Carolina Chocolate Drops. Both made with help from Vintage King!
Ryan F.
In almost 20 years in Pro audio buying, never did I receive a unit so well packed and exactly as described. Works flawlessly. The whole process has been so smooth. I will never hesitate to do business with you guys in the future and will recommend you to everyone I know.
Martin C.
This was my first experience buying something from Vintage King (although I surf the "used" categories on the website frequently!), and, despite being on the other side of the world, I had absolutely no trouble and everything went very smoothly.
Phil T.
The speed of delivery exceeded my expectations! I was VERY pleased that my shipment arrived in time for a scheduled vocal tracking session. The packing insured that my order arrived safely. And the sales staff responded quickly to questions regarding the product.
James P.
Thank you so much! Vintage King has been so fair and easy to work with. I can't thank you enough. It feels good to trust such a hefty purchase to folks who are so helpful and knowledgeable. Vintage King is a sound designers dream store.
Noa L.
You guys have excellent customer service and I am excited about the next upgrade I complete on my fifth recording facility. I've been in the studio business for forty plus years. The salesman I worked with at Vintage King was the best of the best. You all rock!
Robby T.
I would recommend Vintage King to any one looking for top-class gear, unbeatable customer service and the best prices on the map!
Jake D.
My experience with Vintage King was excellent. The order was here fast considering it was out of stock. The sales person had SKB send it to me directly and I couldn't have been more pleased.
Michael D.
From the minute I placed my order I was kept well-informed through each step in your process. Even though I was buying a comparatively modest piece of gear, your attention to detail made me feel like I was purchasing a six-figure mixing desk.
Thomas W.
I am a new customer of yours. You guys provided me the absolute best deals in ordering all the equipment to power my brand new recording studio. Your customer service is amazing and i will always deal with you from here on out.
Rob M.
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Alan B.
Better than expected! Truly impeccable service. Your team was professional, knowledgeable, provided speedy delivery above and beyond standard. Vintage King Audio is definitely my go to for all of my audio and information needs.
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