Overview

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.

Product Details

  • 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.
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.