0% up to 48 Months on over 110 Brands!

New & Current Vintage King Card Holders

Shop Our Summer Sale

0% financing up to 48 Months on over 110 Brands!

When you shop now with your Vintage King Credit Card.

$ 6,490 .00
Your Savings: $ 205 .00 Msrp: $ 6,695 .00
or $271/month for 24 months 0% interest for 24 months. 24 equal monthly payments required. Learn more
In Stock
Item is in stock and will ship the next business day. To inquire if this item is available to ship sooner or is in one of our stores, please call 888.653.1184.



Please note: this item is available for purchase in the United States only.

ATC Loudspeakers SCM20A Pro MK2 2-Way Active Monitor - Pair

Compact, very high performance, active 2-way studio monitor pair equipped with a groundbreaking 6.5-inch Super Linear mid/bass driver, a 1-inch dual-suspension S-spec tweeter, and an all-discrete MOSFET Class A/B amplifier


Product Description

The ATC SCM20A Pro is a active two-way studio monitor that combines outstanding bass response and dynamic range in a compact package. Equipped with a groundbreaking 6.5-inch Super Linear mid/bass driver, a 1-inch dual-suspension S-spec tweeter and an all-discrete MOSFET class A/B amplifier, SCM20ASL monitors deliver balanced, neutral sound with astonishgly low distortion.


The ATC SCM20ASL Pro features a 1-inch soft dome S-spec tweeter with an innovative dual suspension design for pristine high-end. S-spec tweeters combine an exceptionally powerful motor assembly with a lightweight coil former for an extended frequency range up to 25 kHz. Unlike conventional tweeters, S-spec tweeters offer far greater control of the voice coil and dome motion—especially at higher sound pressure levels. By reducing internal distortion, S-spec tweeters deliver improved clarity and definition, and significantly reduce listener fatigue. And with zero ferro fluid, these tweeters are guaranteed to last a lifetime.


ATC SCM20A Pro studio monitors are equipped with a state-of-the-art 6.5-inch Super Linear mid/bass driver for tight, powerful low end. With a unique underhung voice coil design, Super Linear drivers produce extremely low distortion, even at high SPLs. SCM20A Pro studio monitors feature a 150mm bass cone with a grafted 75 mm soft dome to for an extremely wide dynamic range, making them an excellent choice for post production projects.


ATC SCM20A Pro studio monitors use an innovative bi-amplified design to provide 300 total watts of power for crystal-clear distortion-free sound. With 250W powering the Super Linear mid/bass driver and an additional 50W for the S-spec tweeter, SCM20A Pro studio monitors offer impressive headroom and class-leading transparency at any volume level.


  • Drivers: LF 6.5”/150 mm Super Linear, HF 1”/25 mm Dual-Suspension ‘S-Spec’ Tweeter
  • Amplitude linearity: 80 Hz – 20 kHz (±2 dB)
  • Cut-off frequencies: 55 Hz – 25 kHz (-6 dB freestanding)
  • Dispersion: ±80° coherent horizontal, ±10° coherent vertical
  • Maximum continuous: SPL 108 dB (per pair @ 1 m)
  • Audio input: Rear panel mounted female XLR (pin 2 +ve)
  • Input sensitivity: 1 V/2 V RMS or +2.2/+8.2 dBu via switch (ref. bass full output)
  • Input sensitivity trim: 0 dB to -6 dB (via rear panel pot)
  • Total input sensitivity range: 1 V/+2.2 dBu to 4 V/+14.2 dBu
  • Input impedance: 10 kΩ per leg
  • Amplifier output power: Bass 200 W continuous, HF 50 W continuous (1% THD)
  • Crossover frequency: 2.1 kHz
  • Crossover filters: 2nd order/12 dB/oct critically damped with phase compensation
  • Low frequency shelf cut/boost: 80 Hz, -2 dB to +3 dB in 1 dB steps (via rear panel rotary switch)
  • Overload protection: Active FET momentary gain reduction (inc. front panel mounted ‘limit’ LED)
  • Amplifier thermal trip circuit
  • Cabinet Dimensions (HxWxD) : 450 x 250 x 392 mm (17.7″ x 8.8″ x 15.4″)
  • Weight: 28 kg/61.6 lb (per cabinet)

Product Specifications

Condition New
Width 8.8 in
Depth 15.4 in
Height 17.7 in
Unit Weight 61.6 lb
Active or Passive Active
Digital I/O No
Monitor Application Mid-Field
Speaker Configuration Two-Way
Driver Sizes LF: 6.5” super linear / HF: 1” dual-suspension ‘S-spec’
Number of Speakers Pair
Input Connectors Analog XLR
Amp Wattage Bass: 200 W RMS / HF: 50 W RMS (1%THD)
Impedance Input: >10 kOhms balanced
Frequency Range 55 Hz - 25 kHz
Max. SPL 108 dB @ 1 m

Product Reviews

5 out of 5 stars.
Review Count (9)

write a review

Absolutely worth every penny, total game changer!
You can’t unhear these monitors. Most important tool I’ve bought. I also auditioned the 25s and 45s, but decided to go with these and a pair of subs. I will never again own a pair of monitors that don’t bear the ATC logo. These monitors are extremely dynamic, accurate and honest. Zero regrets!

By William D on April 9, 2023

I have made a lot of improvements to my tracking and mixing room, but the ATC SCM20ASL monitors are by far the most significant. I have gone from hearing speakers to listening to the music I am mixing, and am able to make precise and accurate decisions and meaningful changes to my mixes now for certain. Minor EQ or compression changes are obvious now. The spacial image is fantastic. You can hear reverb tails way beyond what I am used to. Non-fatiguing as well. I have relied on infamous white coned monitors for decades along with mix cubes, those are now B and C options. I have these paired with a sub for checking info below 70-80hz, but is not an issue for me, in fact, in a lesser ideal/acoustically treated space, these will be less likely to cause low end build up issues. I spent the first several weeks listening to my favorite albums, and boy, new details and clarity abound in these songs I thought I knew. I have listened to my own past mix, and thanks to some solid mastering engineers, I can tolerate my own mixes. I'm excited for my next projects, mixing will be a joy on these. They are substantially constructed, and require significant support so check your mounting areas and physical space. I have no complaints at all. I sent a personal thank you to ATC and their engineers and builders, that is how much I am appreciating their work. Highly recommended.

By Ted L on April 25, 2022

The best monitors at this size. ATC's rule.

By Tyler B on April 26, 2021

These are the truth. Truly in a league of their own. They are extremely detailed and accurate, however they come with the price tag to match. Bass response is accurate and tight. However if you’re expecting room rattling bass..these are not for you - go barefoot or the like. The mids are absolutely gorgeous. Highs are silky. Forget about ear fatigue. We mix on these for hours on end. These work so nonchalantly, without distortion you may not realize how loud they’re actually playing. Overall, a high end tool for a high end job. Impressive.

By Braulio B on March 30, 2021

i’ve had the pleasure of assisting some great producers here in LA for the last few years and have been able to listen to a lot of different speakers in some really great rooms. all of them sounded impressive in their own way- PMC’s had this sort of holographic depth and imaging, Barefoots with their effortless low end reach, etc etc.

one speaker manufacturer i could never understand the hype over was ATC. every time i would A/B them in the VK showroom or in studio sessions that had a pair up, i always felt overwhelmingly underwhelmed. they don’t extend low, they aren’t exciting on the top, and overall they seemed “weaker” than what other top-dog manufacturers were offering up for the price point.

last summer i finally had the opportunity to build out my own 175 sq ft control room with proper corner bass trapping, 6” top-to-bottom first-reflection absorption and some modest diffusion. the first pair of monitors that landed in here were a pair of Barefoot Footprint 01’s. they had me blown away, as the imaging and low end of them along with different voicing options really seemed to offer an insane amount of versatility for the price. however, i continued struggling with my mixes sounding better in my room than they did in the car or on earbuds. there were no major surprises, as the bass is accurate and the top end seemed to translate well (they will MAKE you fix any harshness if you want to get through a listening session without a migraine) - i still always felt like i was listening to mixes that suffered from wonky midrange, and had the overall amateur haze going on.

i decided to take a chance on ATC’s, and will never sign off on a mix not done on them ever again. they are NOT a shake the room, blow the client away speaker. what they are though is a shortcut to mixes that sound unlike anything i’ve ever done. they force you to make critical midrange decisions from start to finish, and minimize distractions in the highs and lows. make no mistake- it’s all there; the proper sealed cabinet (no ports or radiators) allow them to stretch well down below the stated roll-off point with a speed and accuracy that, in my experience, is unsurpassed. top end is smooth, but will absolutely tell you when you’ve pushed the top end too hard on anything. get your mix/balance in the ballpark on these, and you will be rewarded when you switch to headphones, the car, or even your B set of monitors. for the first time in my life when i listen to stuff i’ve been working on with these, i forget i’m listening to “my” mix, and i’m able to focus on “their” song, and figure out what i can do to help the emotional impact of the song reach its full potential.

they are not the first speaker i’d want to sit down and listen to music on, but i will never make music on anything else again. Always The Champions.

By Michael C on January 24, 2021

My first listen on these speakers was as close to a religious experience I’ve ever had. The clarity and width is unreal. I bought these to upgrade my home setup and ended up getting SCM45’s in my commercial studio 6 months later. I don’t believe there’s any reason or really a way to upgrade anytime soon. One thing: they’re bigger and heavier than you’ll expect.

By Retro C on November 29, 2020

Amazing. Navon rules.

By AlejandroPrieto on November 1, 2020

Navon from VK has been a wealth of knowledge. Very pleased. Tim

By Timothy L on March 24, 2020

These things sound pro. Not sure how else to describe it. Flat as a pancake and revealing in the mid range. My mixes are playing real nice in the car! Just realize that they lack sub bass extension which isn't a major deal for most genre's. There are bass limitations with the cone size and closed port design but there are benefits to that as well.

By Austin F on June 24, 2019

* Required Fields

Share Your Opinion

The best gear advice always comes from those who use it the most. That's where you come in! Let the pro audio world hear your voice with a review of the ATC Loudspeakers SCM20A Pro MK2 2-Way Active Monitor - Pair . Once you submit your review, please check your email and verify your address to have it posted.

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.
Thanks for your great service and getting this out today. You guys really are the Kings!
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.
James O.