SCM45A-PRO - high performance 3-way compact active loudspeaker
The SCM45A Pro is a completely new designed high-performance, three-way compact active loudspeaker. Delivering high output and extended low frequency for its size, without compromising the overall balance it can be used in near- or mid-field positions. SCM45A Pro has two 6,5" woofers for deeper bass response and increased SPL capability, one 3" Soft Dome mid-range driver and ATC’s new proprietary 1” dual-suspension tweeter for increased resolution in the top end.
Those drive units are powered by ATC’s proprietary active Tri - AmpPack, a three-channel discrete MOSFET Class A/B design with 150W, 60W, and 25W for the bass, mid, and high frequency ranges, respectively. Revealingly, the SCM45A Pro is physically symmetrical — not mirror imaged, and is suitably sized for placement on or behind a console meter bridge. It is ideally suited, therefore, to positioning as a centre speaker between other SCM45A Pros and also ATC’s SCM50ASL Pro three-way active loudspeakers.
Key Features
- Proprietary ATC 25mm/1” Dual Suspension Super Tweeter
- ATC hand built 3”/75mm Soft Dome mid-range driver.
- 2 x ATC hand built 6.5”/164mm carbon-paper cone bass drivers.
- On-board grounded source 235 watt Class A/B Tri-amplifier.
- Compact size with high output and low cut-off frequency.
- 6 year warranty.
Technical specifications
- Drive units: 6.5”/164mm short-coil carbon-paper cone (bass), 3”/75mm Soft dome (mid), 1”/25mm Soft dome (hf)
- Amplitude linearity: 70Hz - 17kHz (+/-2dB)
- Cut-off frequencies: 42Hz - 25kHz (-6dB freestanding)
- Horizontal dispersion: +/-80° coherent
- Vertical dispersion: +/-10° coherent
- ;aximum continuous SPL: 112dB (per pair at 1m)
- Audio input: rear panel mounted female xlr (pin 2 +)
- Input sensitivity: 1V rms (ref. full output)
- Input sensitivity trim: 0dB to -6dB (continuously variable)
- Input impedance: balanced >10kΩ
- Amplifier output power: 150W rms (bass), 60W rms (mid), 25W rms (HF)
- Crossover frequencies: 380Hz & 3.5kHz
- Crossover filters: 4th order critically damped with phase compensation
- Low frequency boost: 0dB to +3dB at 40Hz (continuously variable)
- Overload protection: active FET momentary gain reduction
- Mains power requirements: 115/230V, 50/60Hz
- Mains power consumption: 56VA (standby max), 154VA (typical 1/8th power), 375VA (max)
- Thermal output: 53W (idle), 130W (1/8th power)
- Weight: 36kg/66lbs
- Dimensions (HxWxD): 353 x 600 x 375mm (13.9˝ x 23.6˝ x 14.8˝). Handles add an additional 39mm/1.5″ to depth.
