ATC SCM105AC Pro

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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.

Acoustic Specifications:

  • LF: 1 x SB50-164SC 8Ω
  • Mid: 1 x SM75-150 16Ω
  • HF: 1 x SH25-76S 6Ω Compact
  • Low frequency cutoff: 47Hz (-6dB).
  • High frequency cutoff: 25kHz (-6dB).
  • Max SPL: 109dB continuous/ 115dB peak (Measured for a pair of monitors, IEC Weighted Pink Noise, 1m).
  • Sensitivity: +4dBu ref 92dBC (Low band boost 0dB, Input sensitivity 1V, Pink noise).

Electronic specification:

  • Symmetrical input: 1 x Rear panel mounted female XLR socket, pin 2 hot.
  • Input impedance: 20kΩ.
  • Input CMRR: >82dB (10kHz).
  • Input sensitivity control: stepless variable from 2.2dBu - 8.2dBu / 1Vrms - 2Vrms (-6dB)
  • Lower band boost control: infinitely variable from 0dB to +3dB.
  • Crossover: Linkwitz-Riley 4th order, 380Hz and 3.5kHz division frequencies.
  • Frequency response: 200kHz (-3dB).
  • Amplifier: class A/B MOSFET
  • Amplifier power: LF 150W (8Ω), MF 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 operation indicated by LED on front panel
  • Power supply: 220-230V or 115V
  • Power consumption: inactive 24W/35VA. 1/8 power 117W/159VA. full power 255W/324VA.
  • Heat generated: inactive 82BTU/hr. 1/8 power 335 BTU/hr. full power 358BTU/hr.
  • Net weight: 25.1kg
  • Dimensions: 271 x 430 x 411mm (H x W x D)
  • Weight with packaging: 28.15kg
  • Package dimensions: 370 x 560 x 510mm (H x W x D)
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