It’s a short-coil, long-gap, dual-suspension design that mirrors ATC’s highly respected 3″ soft dome midrange. The SCM19A tweeter (model SH25-76 in the ATC catalog) is a 25mm soft dome. Heavy aluminum heatsinks rise vertically above the power button, balanced input, and IEC plug.
#Atc scm drivers
Consequently, all this power is available to the drivers without the significant power losses of a passive network. Keep in mind that because it is an active design, the frequency spectrum is split by the crossover at line-level prior to amplification. The second-order crossover slope at 2.5kHz incorporates phase compensation. The biamplified system powers the mid/bass drive with 150W, and sends 32W to the tweeter. The ATC-engineered Class AB MOSFET amplification is installed in the bottom half of the tower.
To increase floor stability for the slender tower enclosure, ATC provides a wooden plinth “outrigger” stabilizer with threaded floor spikes. Therefore the actual internal volume that the transducers “see” is identical, although-and this is of no small importance-the passive crossover network components have been removed and thus are no longer subject to vibration from the internal back wave of the drivers. The SCM19A is a two-way, acoustic-suspension floorstander but it’s probably more accurate to think of it as the standard SCM19 fused atop an extended cabinet designed to house the electronic crossover and bi-amplification.
#Atc scm plus
However, with the advent of the new Entry Series that comprises three décor-friendly, passive, stand-mount models and a trio of floorstanders (two are active), plus a flurry of excellent reviews and word-of-mouth, ATC seems to be gaining a well-deserved, consumer-based foothold in North America. Fit and finish are always seamless but not indulgent. Thus its look and cosmetics speak to solidity and permanence. Rather it lets its products do the talking. The consumer market has been a tougher reach for ATC in part because it’s a company that doesn’t engage in smoke and mirrors or eye-catching derring-do.
#Atc scm pro
Since then it has developed a worldwide reputation not only for speakers that will play loudly but also for the bulletproof reliability the pro market counts on. Active monitors and electronics soon followed.
#Atc scm professional
Would the differences I experienced at the CES demo translate into my own listening room with the two-way version?Ī brief history: ATC of England begin producing custom transducers for the professional sound market in 1974. Improved imaging, a vastly greater sense of dimensionality and immersion, and a level of low-frequency control that said to me in no uncertain terms “there is no going back.” When I was informed that ATC had plans for an active version of the SCM19, I told them I was all in. The former was the traditional passive design and received comparable power from ATC amplifiers and traditional speaker cabling. The latter, however, was equipped with an internal electronic crossover splitting the signal into tri-amplified power. It was a shootout between the SCM40 and its active cousin the SCM40A-otherwise identical three-way, acoustic-suspension floorstanders. The idea of an active loudspeaker intrigued me but what really sparked my interest was an ATC demonstration of active versus passive at CES 2015.
I recently reviewed its successor, the SCM19 (Issue 245), which proved to be a better overall speaker than my SCM20’s in most every way. Here’s the backstory: I’ve owned a couple versions (passives) of the ATC SCM20SL over the years. Back then, the very idea of a semi-closed system that a bi-amplified loudspeaker like the ATC SCM19A represents would have been heretical to my high-end aspirations. Truth be told, once upon a time I would have included myself in this group. Indeed, this open-system approach is a big part of the hobby, and I don’t begrudge anyone his level of enthusiasm.
#Atc scm upgrade
I’m referring to a large and ardent band of devotees who enjoy the “chase” in the high end-those who make every audio-system component choice with the deliberation of a chess grandmaster contemplating a critical move, weighing each option, mod, or upgrade and scrutinizing the results for the smallest shred of improvement. This review might not sit well with some of my audiophile friends.
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