Sunday, May 30, 2021

ATC SCM100SE big active ATCs Special Edition

The SCM100SE has both and is very well put together.

 The active SCM100SE is an example of  ATC. It’s  almost price no object, albeit in the context of other high end speakers of this size the price is cheap. That’s before you get into the whole discussion about the merits of active filtering, and with each drive unit being powered by an amp optimized for its task. Those drive units are very much what the SCM100SE is all about. Remove the flush fitting grilles and they are revealed, standing proud of the main cabinet in their own matt black baffle.

The look is very much a functional one, accentuated by the gap between ‘brow’ and baffle  the speaker looks more ‘of a piece’ with its grille in place, but then you lose that studio aesthetic. 

The drivers themselves look familiar from past ATC designs, with the 7.5cm midrange dome a signature feature  . Here it’s partnered with an all-new 25mm soft dome tweeter and a 30cm bass unit, the ensemble being mounted in a 100-litre cabinet – hence the model number.



Finally the dual suspension arrangement, using two small roll-surrounds, gives more accurate control of the motion of the dome and coil. The partnering 30cm woofer works from 380Hz downward, and also uses the company’s short-coil/long gap motor, with extra rings of magnetic material placed inside and outside the magnetic gap. The cone itself is made from paper with a little carbon in the blend. 

ATC says it sticks to paper composites rather than the more exotic diaphragm materials, as it prefers their balance of strength, stiffness and internal damping. The bass unit is tuned via a substantial reflex port venting through the thick front baffle.


TECHNICAL SPECIFICATIONS

Type: Three-way, three-driver, floor standing speaker with active drive and reflex-loaded enclosure Driver complement: 1 x SH25-76S 25mm ATC soft dome, dual suspension tweeter; 1 x ATC SM75-150S 75mm/3” soft dome midrange driver; 1 x ATC SB75-314SL 314mm/12” ‘Super Linear’ magnet bass driver. 

Crossover frequencies: 380Hz, 3.5kHz

Frequency response: 32Hz–25kHz (-6dB)

Amplifier output: 200W LF, 100W MF, 50W HF

Input sensitivity: 1V

Protection: Fabric grilles

Finishes: Satin lacquered or high gloss, black, white and a range of wood veneers

Dimensions without spikes (H×W×D): 1150 ×419 ×585mm

Weight: 79kg/each 

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