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ATC Loudspeakers SCM20PSL/P2 Bundle

SCM20PSL MK2 - Pair and P2 Pro Amplifier
ATC Loudspeakers SCM20PSL/P2 Bundle


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The ATC Loudspeakers SCM20PSL/P2 Bundle pairs together a pair SCM20PSL passive monitors with the 300 watt dual mono P2 Pro Amplifier. This is the perfect bundle for attaining high-end ATC monitoring in home studios.

The ATC SCM20PSL MK2 loudspeakers maintain the strict performance criteria of ATC reference monitors, the SCM 20SL MKII offers project and home studios the dynamic range and pristine imaging ATC is known for worldwide.

Designed to fit within the company's highly-regarded line of speakers, the ATC "Passive 20" features the same ATC built woofer and tweeter as the active (SCM20ASL) version of the speaker. The SCM20SL MKII passives are housed in a conventional "pro-black" box for easy placement on any meter bridge.

ATC recommends amplifiers with at least 200W per channel of power. The Passive 20 loudspeaker enables ATC speaker fans to own a high-performance monitor at half the price of the actives.

The SCM20SL Passive low-frequency section is a hybrid design incorporating a 150mm bass cone with a grafted 75mm soft dome for mid-range assist. The woofer magnet assembly utilizes ATC's unique "SL" technology to greatly reduce third harmonic distortion and reveal mistakes and details. The tweeters are ATCs new dual suspension high powered tweeters. They do not use ferro fluid for cooling so will last a lifetime. A newly redesigned crossover ensures a smooth transition across all frequencies. All ATC drivers are manufactured in-house to exacting tolerances and are legendary for their many design innovations.


  • Max Continuous SPL: 108 dB
  • Crossover: 2.8 kHz/ Internal, 2nd order,passive
  • Woofer: ATC 6.5"SL
  • Tweeter: 1" dome
  • H/W/D in inches: 17.3/9.9/11.9
  • Weight: 44 lb ea
  • Shipping Weight: 50 lb ea
  • Cabinet: Wood, Black Ash

The ATC Loudspeakers P2 Pro Amplifier is true dual-mono power amplifier delivering 300 W per channel with minimal crosstalk.


  • 300 W per channel
  • True dual-mono design delivers full power simultaneously from both channels, with minimal crosstalk
  • Grounded source class A/B circuit topology as found in ATC’s renowned active loudspeakers
  • Ultra wide bandwidth, low distortion and high dynamic range ensure tonal accuracy and perfectly timed transients
  • No compromise, high performance power supply and large heatsinks guarantee outstanding stability and long term reliability
  • A perfect match for any passive studio reference monitor
  • 19” rack mountable convection cooled chassis
  • Hand built in the UK and supported by a 6 year warranty

Additional Information

Condition New
Width 9.8 in (monitors)
Depth 11.6 in (monitors)
Height 17.7 in (monitors)
Unit Weight 39.7 lb
Active or Passive passive
driver_sizes LF: 6.5” super linear / HF: 1” dual-suspension ‘S-Spec’
Number of Speakers Pair
Input Connectors Binding Post
Impedance 8 Ohms
Frequency Range 55 Hz - 25 kHz
Max. SPL 108 dB @ 1 m

Revealing. Listening to music on these is not a pleasant experience unless mixed well, which is the point. Best paired with a sub - currently running a Subwoofer Pros Studio Sub 12, which I believe is designed to complement this specific ATC monitor range.

By Chris C on November 13, 2018

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