ATC Loudspeakers SCM105AC Pro

A mid-field central studio monitor.

Low enclosure design facilitates installation in not very large directors. Symmetrical driver layout. Ideal partner for SCM50/100/110A Pro* stereo monitors. Dual 9”/234 mm SL bass drivers, 3”/75 mm soft dome midrange, 1”/25 mm soft dome tweeter. 3-way active design with precision active crossovers and discrete MOSFET power amplifiers, integrated as a proprietary „Amp-Pack”. A wall-mounted version with an external amplifier, the SCM105AiWC Pro, is also available. Wide dynamic range and frequency response.
*Can be combined with the SCM150A Pro, but the maximum SPL value should be considered.

Acoustic Specifications:

• Transducers:
  • Bass: 2 x SB75-234SL 16 Ω.
  • Center: 1 x SM75-150S 16 ohm.
  • High frequencies: 1 x SH25-76S 6 Ω.
• Low-frequency cutoff: 30 Hz (-6 dB, anechoic).
• High-frequency cutoff: 25 kHz (-6 dB).
• Amplitude linearity: 50 Hz - 17 kHz (+/- 2 dB).
• Matched characteristics: +/-0.5 dB.
• Crossover points: 380 Hz and 3.5 kHz.
• MaxSPL: 115 dB continuous, 121 dB peak (per pair, weighted IEC pink noise, 1 m, anechoic).
• System sensitivity: 85 dBC ref. -20 dBu (per single unit, 1 m, pink noise, 0 dB bass gain, 2.2 dBu/1 V sensitivity).

Electronic specification:

• Symmetrical input: 1 x female XLR connector mounted on the rear panel, pin 2 hot.
• Input impedance: 20 kΩ (differential).
• Input CMRR: >82 dB (10 kHz).
• Input sensitivity: 2.2 dBu/1 Vrms at full power.
• Input sensitivity adjustment: infinitely adjustable from 2.2 dBu to 8.2 dBu / 1 Vrms to 2 Vrms (-6 dB).
• Bass gain adjustment: infinitely adjustable from 0 dB to +6 dB.
• Crossover filters: fourth-order Linkwitz-Riley.
• Frequency response: 200 kHz (-3 dB).
• Amplifier type: class A/B based on MOSFET transistors with grounded source, convection cooled.
• Output power: bass 200 W (8 Ω), midrange 100 W (16 Ω), treble 50 W (6 Ω). THD+N: <0.003%/-92 dB (1 kHz, 1 dB below rated power, 90 kHz frequency response).
• Limiter: active ATC FET gain reduction, limiter „active” indicated by front panel LED.
• Mains input: mounted on the rear panel, 220-230 V or 115 V - factory setting. Observe the markings and labels on the panel!
• Power consumption: at rest 37 W / 51 VA. 1/8 power 132 W / 178 VA. Full power 321 W / 403 VA.
• Thermal efficiency: at rest 126 BTU/h. 1/8 power 366 BTU/h. Full power 413 BTU/h.