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ATC SCM20PSL Pro mk2 6.5 inch Passive Studio Monitors Certified Open Box

2-way, 6.5" Passive Nearfield Monitor with Proprietary Super Linear Mid/Bass Driver and Dual Suspension S-Spec Tweeter (pair)
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Item ID: SCM20PSLmk2d1
ATC SCM20PSL Pro mk2 6.5 inch Passive Studio Monitors
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Certified Open Box Savings!

Save $879 What is Certified Open Box?

The price below reflects your savings.

Price:$4,111 and 00 cents
Savings: $879.00

New for $4,990.00

Condition Notes:

This returned item is in good condition with some signs of use but is in perfect working order. One of the monitors has a couple cracks on the face plate and a dent on the top corner. The other monitor has a dent on the rear back corner. Includes all original accessories. This item ships in its original packaging which shows some signs of wear.

This item was thoroughly inspected by our factory-authorized service team and is backed by Sweetwater's exclusive 2-year warranty. The images shown do not necessarily represent the condition of this particular item.

Special Financing - Ends Aug 2, 2026. $115/month with 36 month financing*

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ATC SCM20PSL Pro mk2 6.5 inch Passive Studio Monitors
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Hear Every Nuance in Your Recordings

You'll hear an amazing upgrade in the sound of your studio with the ATC SCM20PSL Pro Mk2 passive studio monitors. ATC monitors are handmade in the UK using cutting-edge components and processes, and you'll immediately hear why they're considered among the finest reference monitors in the world. You'll find ATC monitors in the studios of George Massenburg, Chuck Ainlay, Nathaniel Kunkel, and many other world-renowned engineers. For a nearfield monitoring experience that sets a new standard for sonic accuracy and mixing precision, choose the ATC SMC20ASL Pro Mk2.

Engineering the best speaker possible

Heavy science and engineering back up every ATC product. These monitors aren't just cobbled together from parts that will work together. The ATC SCM20PSL Pro Mk2 was thoroughly engineered to give you the best sound, response, and reproduction of your audio possible. You'll hear every detail in your recordings. Sweetwater uses ATC monitors in our world-class recording facilities, and many of our employees use them in their personal studios. Hear the difference expertly engineered monitors can make with the ATC SCM20PSL Pro Mk2.

Proprietary drivers offer lifelike playback

Great-sounding monitors start with great-sounding speakers. The ATC SCM20PSL Pro Mk2 LF drivers are manufactured to exacting standards at their in-house facility. Hand-wound voice coils are made from flat oxygen-free copper wire and operate in a precision long magnetic gap. Specially designed magnet vents not only reduce airflow noise and heat but also increase power handling and reliability. These drivers are designed to give you a smooth and even frequency response without built-in EQ. In short, the SCM20PSL Pro Mk2 monitor is designed to perform at the top of its class.

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 SCM20PSL Pro Mk2 Passive 2-way Studio Monitor Pair Features:

  • Premium 2-way passive studio monitors
  • Proprietary drivers expose every detail in your mixes
  • 6.5" Super Linear Mid/Bass Driver and 1" Dual Suspension S-Spec Tweeter
  • Delivers maximum transparency at any volume level
  • Engineered to give you the most accurate playback possible
  • Perfect for tracking, mixing, and mastering
  • Ideal for stereo as well as multichannel monitoring configurations
  • Recommended amplifier power: 75–300 watts
  • Bi-ampable, with 2 pairs of binding posts/4mm banana jacks
  • Includes ATC's 6-year limited warranty
What is Certified Open Box Gear?

At Sweetwater, we're so picky that what we call "Certified Open Box" is actually better than what most music retailers sell as "new" gear! Our gear hasn't endured hundreds of people a week plunking away at all the keyboards, fumbling through Stairway to Heaven on every guitar or playing with every fader and knob on a mixer or control surface.

Certified Open Box (also known as a demo) means we’ve had it out of the box for our YouTube channel, displayed at events, tested in our studio, or maybe it was in a customer’s hands for a few days and isn’t ‘factory fresh’ as a result. Every Certified Open Box item we sell has Sweetwater’s 2-year Total Confidence Coverage™ warranty and has been tested and verified up to ‘new’ specs by our factory-authorized technicians to make sure it’s in perfect working order before we ship it to you.

When you buy a Certified Open Box item at Sweetwater, you get:
  • 2-year Total Confidence Coverage Warranty™!
  • Products inspected and tested by our factory-authorized techs, guaranteed to function like new (or better)!
  • FREE shipping on most items
  • Equipment that will MEET or EXCEED your expectations!

Click HERE to browse our current inventory of Certified Open Box equipment. Purchasing Certified Open Box gear from Sweetwater is a smart and safe way to save!

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Warranty Info

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Extra peace of mind at no extra cost.

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Tech Specs

  • Quantity: Pair
  • LF Driver Size: 6.5" woofer
  • LF Driver Type: Bass/mid driver
  • HF Driver Size: 1" tweeter
  • HF Driver Type: Dual suspension, soft dome
  • Watts Per Channel: 75W to 300W recommended
  • Impedance: 8 ohms
  • Frequency Response: 80Hz-20kHz (±2 dB), Cut off range: 55Hz-25kHz (-6 dB freestanding)
  • Maximum Peak SPL: 108 dB (per pair @ 1m)
  • Crossover Frequency: 2.1kHz
  • Enclosure Type: Sealed
  • Input Types: 2 x binding posts
  • Output Types: 2 x binding posts
  • Height: 17.72"
  • Width: 9.84"
  • Depth: 11.95"
  • Weight: 39.7 lbs.
  • Manufacturer Part Number: SCM20P PRO Mk2

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Reviews

The most accurate mid-range I ever heard.
I'm been recording and producing for 18 years in commercial studios and test many high-end speakers, but the mid-range and thigh low end of the ATC is the most accurate I ever heard. Special Thanks Alan Finkbeiner for recommending these speakers.
Music background: Producer - Engineer at Thirdfire Records
Can't beat ATC - a nice step up from the SCM 12s
I'd been using the ATC SCM 12s with an ATC P1 amp and a sub for a few years - recently decided to upgrade to the larger 20s. I'm very happy with the decision - love the improved dynamic range and high-frequency extension of the 20s and you get more of that ATC detail you find on larger models. Still similar to the 12s, just more of what I already liked about them. P1 still works great to power the 20s and I no longer need a sub.