Essential Information About the ATC SCM25A Pro Mk2 3-Way Active Studio Monitor
- Latest generation SH25-76S "Dual Suspension" Tweeter: extended highs, reduced distortion, faster transient response.
- Compact 3-way architecture with SM75-150 dome midrange: exceptional midrange clarity and reliable translation.
- High dynamic headroom: up to 109 dB continuous / 115 dB peak (per pair) for compression-free monitoring.
- Firm bass down to 47 Hz and 4th order Linkwitz-Riley crossover: stable imaging and precise tonal balance in nearfield.
An ATC Best-Seller, Modernized in Mk2 Version
The SCM25A Pro has established itself as a compact monitoring reference in mixing and post-production studios. In the Mk2 version, ATC retains the sonic signature that made it successful and enhances it with the SH25-76S "Dual Suspension" tweeter. This update extends the high-frequency response while lowering distortion, delivering superior definition and better off-axis coherence.
Who Is It For and What Are Its Uses?
Designed for demanding nearfield monitoring, the SCM25A Pro Mk2 targets sound engineers, producers, and sound designers seeking a neutral sound, transient precision, and wide dynamic range in compact workspaces: mix control rooms, editing booths, mobile stations, and post-production rooms.
Key Features Supporting Your Decisions
Low Distortion Mk2 Tweeter
The new SH25-76S "Dual Suspension" tweeter offers extension up to 25 kHz and reduced distortion, making air, reverb, and harmonic details more evident and therefore easier to balance.
ATC SM75-150 Dome Midrange
A true brand signature, this driver ensures remarkable intelligibility of vocals, guitars, and critical mix elements, with controlled directivity and exemplary phase coherence via 4th order Linkwitz-Riley filters at 380 Hz and 3.5 kHz.
Precise Bass and MOSFET Amplification
The 164 mm woofer works with dedicated class A/B MOSFET amplification to deliver deep, fast, and controlled bass, with bass amplification control from 0 to +3 dB to adapt the response to the room.
Adjustment Ergonomics and Protection
Symmetrical XLR input, variable input sensitivity, and active FET limiter with front panel LED secure high-level listening without surprises while maintaining tonal stability.
Technical Specifications
Drivers
- Bass: 1 x SB50-164SC 8 ohms
- Midrange: 1 x SM75-150 16 ohms
- HF: 1 x SH25-76S 6 ohms, "Dual Suspension", compact
- Low-frequency cutoff: 47 Hz (-6 dB, anechoic)
- High-frequency cutoff: 25 kHz (-6 dB)
Acoustic Performance
- Maximum sound pressure level: 109 dB continuous / 115 dB peak (per pair, IEC weighted pink noise, 1 m, anechoic)
- Sensitivity: +4 dBu ref 92 dBC (Bass Boost 0 dB, input sensitivity 1 V, pink noise)
Connectivity and Controls
- Balanced input: 1 x female XLR on rear panel, pin 2 hot
- Input impedance: 20 k ohms (differential)
- Input CMRR: >82 dB (10 kHz)
- Input sensitivity: 2.2 dBu / 1 Vrms at full power
- Input sensitivity control: continuously variable from 2.2 dBu to 8.2 dBu / 1 Vrms to 2 Vrms (-6 dB)
- Bass amplification control: continuously variable from 0 dB to +3 dB
- Crossover filters: 4th order Linkwitz-Riley at 380 Hz and 3.5 kHz
Electronics and Amplification
- Frequency response: <2 Hz to >200 kHz (-3 dB)
- Amplifier type: class A/B MOSFET source grounded, convection cooled
- Output powers: Bass 150 W (8 ohms), Mid 60 W (8 ohms), HF 32 W (6 ohms)
- THD+N: <0.003% / -92 dB (1 kHz, 1 dB below rated power, 90 kHz bandwidth)
- Limiter: ATC Active FET momentary gain reduction, "active" limiter indicated by front panel LED
Power Supply and Consumption
- Mains input: 220-230 V or 115 V (factory set)
- Power consumption: idle 24 W / 35 VA; 1/8 power 117 W / 159 VA; full power 255 W / 324 VA
- Heat output: idle 82 BTU/h; 1/8 power 335 BTU/h; full power 358 BTU/h
Dimensions and Weight
- Dimensions (1 speaker): 271 x 430 x 411 mm
- Weight (1 speaker): 25 kg
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