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A film about ATC SCM40A Active floor-standers

In this film review about ATC’s SCM40A Active floor-standing speakers, appraised in my article here, they may not be active enough to be going anywhere under their 36kg weight, but in HiFi terms these are Active speakers with a capital A.

Re-considering passive speakers for their active cousins, is a reckoning to make in HiFi, if you’ve never been on the journey. ATC’s SCM40A are an extant lesson on this score.

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If you were lucky enough to visit the ATC Room at the Bristol HiFi Show you will know what I mean of my florid descriptives about these trailblazers.

If you want to read more about Active Cross-overs or different classes of amplifier click here and here.

Or if you are more technically minded, read ATC’s article here on the benefits of an active loudspeaker system.


ATC SCM40 film review

ATC Loudspeaker Technology Ltd
Gypsy Lane, Aston Down, Stroud, Gloucestershire, GL6 8HR.
Tel: +44 (0)1285 760561
Web :



ATC SCM 40 film review
ATC SCM40 film review

Overview – from ATC website

  • New ATC designed and built dual suspension 25mm soft dome HF unit with precision alloy wave guide.
  • ATC Soft Domemid-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 crossover filters and overload protection.
  • 6 year warranty.
ATC SCM 40A all finishes
Finishes – black ash, smooth black, smooth white, cherry

Specifications from ATC Website

  • 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): 980 x 370 x 344mm (inc. foot plinth & amp, spikes add 25mm to height, grill adds 34mm to depth)
  • Weight: 36kg
  • Finishes : cherry, black ash, smooth white and black (as above)

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Written by Simon Price

I'm music lover who shares experiences of faithfully reproduced audio in an ENGAGING way with HIGH VIDEO PRODUCTION VALUES. I enjoy and make reviews as I love audio gadgets, being a voice on audio and producing creative videos that ultimately benefit the industry and new participation. I keep technicalities easy, as I believe great audio serves music and music is inclusive and to be enjoyed by all!

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