ATC SCM25A Pro MK2 Active Monitors

3-way active monitors



The ATC SCM25A Pro Mk2 is a compact 3-way high-performance active studio monitor loudspeaker, based around a 6.5”/164mm bass driver. The monitors combination of exceptional mid-range clarity, high output, extended bass response and modest size makes it ideal for nearfield monitoring in a wide range of critical applications.

The latest Mk2 version is updated with ATC’s latest SH2576S ‘Dual Suspension’ tweeter, extending the highfrequency response along with a reduction in distortion. These improvements ensure faster decision making and outstanding translation outside the studio.

ATC SCM25A Pro MK2 Features:

  • 3way design featuring ATC SM75150 Soft Dome midrange driver.
  • Wide dispersion vs frequency for excellent stereo imaging over a large listening area.
  • ATC discrete MOSFET class A/B amppack delivers high dynamic range in combination with very low distortion and an extended HF bandwidth.
  • 4th order active crossovers with allpass phase compensation ensure outstanding driver integration.
  • Input sensitivity and bass ‘lift’ user controls.
  • Handbuilt in England and covered by a 6year warranty.


  • Drive Units
    • Bass: 1 x SB50164SC 8Ω
    • Mid: 1 x SM75150 16Ω
    • HF: 1 x SH2576S Compact
  • Low Frequency Cutoff: 47Hz (6dB, anechoic).
  • High Frequency Cutoff: 25kHz (6dB).
  • Max SPL: 109dB continuous / 115dB peak (Per pair, IEC Weighted Pink Noise, 1m, anechoic).
  • Sensitivity: +4dBu ref 92dBC (Bass Boot 0dB, Input Sensitivity 1V, Pink noise).
  • Electronic Specifications:
    • Balanced Input: 1 x Rear Panel Mounted Female XLR, pin 2 hot.
    • Input Impedance: 20kΩ (differential).
    • Input CMRR: >82dB (10kHz).
    • Input Sensitivity: 2.2dBu / 1Vrms for full power
    • Input Sensitivity Control: Continuously Variable from 2.2dBu 8.2dBu / 1Vrms 2Vrms (6dB)
    • Bass Boost Control: Continuously variable from 0dB to +3dB.
    • Crossover Filters: 4th Order LinkwitzRiley at 380Hz and 3.5kHz.
    • Frequency Response: <2Hz to >200kHz (3dB).
    • Amplifier type: Grounded Source MOSFET based Class A/B, convection cooled.
    • Output Power: Bass 150W (), Mid 60W (), HF 32W ()
    • THD+N: <0.003%/92dB (1kHz, 1dB below rated power, 90kHz BW)
    • Limiter: ATC Active FET Momentary Gain Reduction, limiter ‘active’ indicated via front panel LED.
    • Mains Input: 220230V or 115V Factory set. Please observe panel markings and labels!
    • Power Consumption: Idle 24W/35VA. 1/8th Power 117W/159VA. Full Power 255W/324VA.
    • Heat Output: Idle 82BTU/hr. 1/8th power 335 BTU/hr. Full Power 358BTU/hr.
  • Physical Specifications
    • Net Weight: 25.1kg/55.2lbs
    • Product Dimensions: 271 x 430 x 411mm / 10 11/16th x 16 15/16th x 16 3/16th (H x W x D) See drawing for full
    • Manual here


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Additional information

Weight 10 kg