ATC SCM25A Pro MKII 3-way Active Studio Monitor



The 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 SH25-76S ‘Dual Suspension’ tweeter, extending the high-frequency response along with a reduction in distortion.  These improvements ensure faster decision making and outstanding translation outside the studio.


  • 3-way design featuring ATC SM75-150 Soft Dome mid-range driver.
  • Wide dispersion vs frequency for excellent stereo imaging over a large listening area.
  • ATC discrete MOSFET class A/B amp-pack delivers high dynamic range in combination with very low distortion and an extended HF bandwidth.
  • 4th order active crossovers with all-pass phase compensation ensure outstanding driver integration.
  • Input sensitivity and bass ‘lift’ user controls.
  • Hand-built in England and covered by a 6-year warranty.


Drive Units  
Bass: 1 x SB50-164SC 8Ω
Mid: 1 x SM75-150 16Ω
HF: 1 x SH25-76S 6Ω Compact

Low Frequency Cut-off: 47Hz (-6dB, anechoic).
High Frequency Cut-off: 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).


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 Linkwitz-Riley 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 (8Ω), Mid 60W (8Ω), HF 32W (6Ω)
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: 220-230V 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.


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 details. 

Additional information

Weight 25.1 kg
Dimensions 27 × 43 × 41 cm


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