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ATC Loudspeakers SCM20ASL Pro MK2 2-Way Active Monitor - Pair

Compact, very high performance, active 2-way studio monitors

Product Description

The ATC SCM20PSL 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 SCM20ASL 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. SCM20PSL 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 SCM20ASL 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, SCM20ASL 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
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 (2)

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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

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