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ATC SCM40AT ACTIVE Floorstanding loudspeakers SCM-40AT

ATC SCM40AT ACTIVE Floorstanding loudspeakers SCM-40AT
ATC SCM40AT ACTIVE Floorstanding loudspeakers SCM-40AT
ATC SCM40AT ACTIVE Floorstanding loudspeakers SCM-40AT
ATC SCM40AT ACTIVE Floorstanding loudspeakers SCM-40AT
ATC SCM40AT ACTIVE Floorstanding loudspeakers SCM-40AT
Product Code:  ATC SCM40AT
Product Brand:  ATC
Product Condition:  New
Finish / Colour
ATC SCM40AT ACTIVE Floorstanding loudspeakers - Tri Amplified

What Hi-Fi have reviewed the new SCM40A as part of their monthly ‘Temptations’ feature. Here is a little of what they had to say:

these ATCs… take all in their stride, revealing a lovely cohesion throughout the frequency range. Resolution, timing and dynamics are all spot-on… factor in the built-in amplification, exotically engineered in-house drive units and the resultant exceptional sound quality, and the SCM40As emerge as something of a high-end bargain. Consider us smitten.” What Hi-Fi"


“The mid range is the money zone in speakers, and never is this truer than with the SCM40As. The soft dome is a revelation, especially with acoustic guitars. The romantic Mexican string style in “Puesta Del Sol” by Sean Harkness combines mellow richness with clarity. This accuracy is a hallmark of ATC.”

“If you’re tired of the cable and equipment hassle, I can’t suggest a better pair of active speakers than the ATC SCM40As. They produce sound well beyond what their price tag suggests, especially considering that you will eliminate at least a few thousand dollars in speaker cables and power amplifiers.”


“… the ATCs are full bandwidth speakers that have grip in the bottom end and a total absence of ventilation on the cabinet. The bass is deep, solid and, thanks to the active operation, tactile. It has a degree of solidity that makes everything feel like it’s in the room, that and the ability to play at the sort of level that approaches that of live sound you get in a studio control room.”

Stereo Times

A technical must read -

The SCM40A utilises ATC’s remarkable soft dome dual-suspension SH25-76 tweeter together with the company’s signature 75mm soft dome mid-range and a 164mm short coil/long gap (under-hung) bass unit. The drivers are powered individually by a proprietary ATC tri-amplifier pack.

Amplifier Power comes in a Tri Amplifier configuration utilising a discrete MOSFET, class AB three-channel amplifier uses ATC’s Grounded Source output stage to deliver 32W to the HF driver, 60W to mid and 150W to the bass driver for a total of 235 watts continuous power. Input is via balanced XLR. 

SCM40A Overview & Specification 
  • New ATC designed and built dual suspension 25mm soft dome HF unit with precision alloy wave guide.
  • ATC Soft Dome mid-range driver.
  • ATC 164mm short coil bass driver.
  • All drive units incorporate massive optimised motor assemblies.
  • On-board grounded source 242 watt Class A/B Tri-amplifier.
  • Active filters and overload protection.
  • 6 year warranty.
Drivers: HF ATC 25mm dual suspension Tweeter, Mid 75mm ATC Soft Dome, LF ATC 164mm SC
Matched Response: ±0.5dB
Frequency Response (-6dB): 48Hz-22kHz
Dispersion: ±80° Coherent Horizontal, ±10° Coherent Vertical
Max SPL: 112dB
Crossover Frequencies: 380Hz & 3.5kHz
Connectors: Male XLR
Input sensitivity : 1V
Filters : 4th Order critically damped with phase compensation.
Overload Protection : Active FET momentary gain reduction.
Fault Protection : DC fault protection and thermal trip. Fault indication on rear panel mounted LED.
Amplifier Output: 150W LF, 60W MF, 32W HF
Cabinet Dimensions (HxWxD): 980x265x344mm (spikes add 25mm, grill adds 34mm to depth)
Weight:  36kg each


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