ATC SCM25A Pro Mk2 – Compact, High-Quality 3-Way Studio Monitor

The ATC SCM25A Pro Mk2 is an active 3-way studio monitor designed for the highest level of precision in a professional studio environment. Featuring a 6.5-inch low-frequency driver housed in a vented 25-liter cabinet, this monitor combines midrange precision, powerful bass, and balanced high frequencies to deliver exceptional sound quality. Thanks to its compact size and nearfield monitoring capabilities, the SCM25A Pro Mk2 is the perfect choice for sound engineers and music producers seeking reliable monitoring solutions.

Design and Drivers – Unmatched Clarity and Detail

The SCM25A Pro Mk2 features unique ATC-manufactured drivers that provide outstanding sound quality across the entire frequency range. A 6.5-inch SB50-164SC woofer handles low frequencies below 380 Hz, while a 3-inch midrange dome driver (SM75-150) covers the 380 Hz to 3.5 kHz range. The high frequencies above 3.5 kHz are managed by the 1-inch SH25-76S dual-suspension tweeter. The Mk2 version has an improved tweeter for even more detailed sound reproduction.

Class A/B Amplifier – Power and Precision

The SCM25A Pro Mk2 features an integrated 3-channel Class A/B amplifier, which is mounted at the rear of the cabinet and allows optimal power matching for each driver. This amplifier delivers impressive power output: 150 W for the low-frequency driver, 60 W for the midrange driver, and 32 W for the tweeter, ensuring full-spectrum coverage with minimal distortion and excellent dynamics.

Active Crossover and Precise Filters

An active 4th-order Linkwitz-Riley crossover with crossover points at 380 Hz and 3.5 kHz ensures perfect driver integration. All-pass filters, designed for optimal phase response at crossover points, lead to a consistent tonal balance, excellent stereo imaging, and even frequency response both on and off-axis.

Monitoring Control – Sensitivity and Bass Adjustment

Located on the rear panel of the monitor is a balanced XLR input, along with controls for input sensitivity and bass boost. This flexibility allows for perfect adjustment of the monitor’s characteristics to the acoustics of the listening environment and the user’s preferences.

Overload Protection – Built-in FET Limiter

The SCM25A Pro Mk2 monitors are equipped with FET limiters that protect the drivers from overloading and reduce "hard-clipping" distortion. Limiter activity is indicated on the front panel by a bi-color LED light.

Technical Specifications of ATC SCM25A Pro Mk2

Acoustic:

• LF Driver: 1 x SB50-164SC 8Ω (6.5” woofer)
• MF Driver: 1 x SM75-150 16Ω (3” midrange dome driver)
• HF Driver: 1 x SH25-76S 6Ω (1” dual-suspension tweeter)
• Low-Frequency Cutoff: 47 Hz (-6 dB)
• High-Frequency Cutoff: 25 kHz (-6 dB)
• Max SPL: 109 dB continuous / 115 dB peak (pair of monitors, IEC pink noise weighted, 1 m)
• Sensitivity: +4 dBu (ref 92 dBC, bass boost 0 dB, input sensitivity 1V, pink noise)

Electronic:

• Balanced Input: XLR female socket (pin 2 hot) on the rear panel
• Input Impedance: 20 kΩ
• Input CMRR: >82 dB (10 kHz)
• Input Sensitivity Control: continuously variable from 2.2 dBu to 8.2 dBu / 1 Vrms – 2 Vrms (-6 dB)
• Bass Boost Control: continuously variable from 0 dB to +3 dB
• Crossover: Linkwitz-Riley 4th-order, crossover frequencies at 380 Hz and 3.5 kHz
• Frequency Response: <2 Hz to >200 kHz (-3 dB)
• Amplifier: Class A/B MOSFET
• Amplifier Power:
  • LF: 150 W (8Ω)
  • MF: 60 W (8Ω)
  • HF: 32 W (6Ω)
• THD+N: <0.003%/-92 dB (1 kHz, 1 dB below nominal power, 90 kHz BW)
• Limiter: Active FET (indicated by LED light)
• Power Supply: 220-230V or 115V
• Power Consumption:
  • Inactive: 24W/35VA
  • 1/8 Power: 117W/159VA
  • Full Power: 255W/324VA
• Heat Dissipation:
  • Inactive: 82 BTU/hr
  • 1/8 Power: 335 BTU/hr
  • Full Power: 358 BTU/hr

Physical:

• Dimensions: 271 x 430 x 411 mm (H x W x D)
• Net Weight: 25.1 kg
• Packaging Dimensions: 370 x 560 x 510 mm (H x W x D)
• Packaged Weight: 28.15 kg

The ATC SCM25A Pro Mk2 is a handcrafted studio monitor made in England that impresses with its power, precision, and adjustability in a compact form, providing the best sound quality in any listening environment. It comes with a 6-year manufacturer warranty, ensuring reliability and durability.