Pro Audio Company ATC Targets Install Market with Release of SCM19AT Loudspeaker

Designed for consumer applications, the floorstanding SCM19AT provides homeowners with a slim-profile speaker that can be used for a variety of home audio applications.


With a diverse list of professional users that includes Dolby Laboratories, Audi Acoustic Research and Shure Microphones, ATC Loudspeakers (Acoustic Transducer Company) is widely known in the pro audio market. What may not be as well known is that ATC also offers a consumer line of products that includes bookshelf speakers, mini monitors and floorstanding passive and active loudspeakers. 

The latest speaker from the company is the SCM19AT, which is an active version of the company's SCM19 small-footprint loudspeaker. 

Available from its American distributor Lone Mountain Audio, the room-friendly SCM19AT can be used for a variety of home audio applications. Part of the company's HiFi Series, ATC says the line of products are designed to bring a recording studio experience to the home, and in the case of the SCM19AT, the slim-profile speaker's cabinet provides 19-liters of volume, while housing the speaker's drivers and electronics. 

Looking at the SCM19AT's two-way design, the speaker employs an ATC SH25-76 1-inch tweeter that utilizes a dual-suspension system that surpresses “rocking modes even at high-power output levels.” ATC explains more by saying the tweeter uses a short edge-wound voice coil in a long, narrow magnetic gap that is said to minimize distortion throughout the tweeter's operating band, while eliminating the need for ferro-fluid cooling methods. 

The tweeter also features a 15,000-gauss (1.5 Tesla) neodymium magnet, along with a black, heat-treated backplate that dissipates heat away from the voice coil. The tweeter sits in a machined 5.5mm alloy waveguide that helps to optimize dispersion and a flat frequency response. 

ATC says the speaker's 5.9-inch (150mm) woofer incorporates a weighted doped fabric cone with a 75mm soft dome that is said to produce broadly and evenly dispersed midrange frequencies. The company goes on to say the midrange/bass unit is driven by an “underhung” short coil, long gap motor that includes a 19-pound “super Linear” magnetic system that is a proprietary design.  

Powering the drivers is the company's two-way, on-board amp pack design that includes protection circuits for DC offset and thermal overload. The tweeter is driven by a 32-watt amp and the midrange/bass driver is powered by an 150-watt amplifier. ATC adds its Grounded Source Output Stage circuit feeds a two-way active, second-order, modified Butterworth crossover design as part of the speaker's advanced electronics.

Carrying a retail price of $9,999 per pair, the SCM19AT is rated to produce a frequency response of 54Hz to 22kHz. 

About the Author

Robert Archer
Robert Archer:

Bob is an audio enthusiast who has written about consumer electronics for various publications within Massachusetts before joining the staff of CE Pro in 2000. Bob is THX Level I certified, and he's also taken classes from the Imaging Science Foundation (ISF) and Home Acoustics Alliance (HAA). Bob also serves as the technology editor for CE Pro's sister publication Commercial Integrator. In addition, he's studied guitar and music theory at Sarrin Music Studios in Wakefield, Mass., and he also studies Kyokushin karate at 5 Dragons and Brazilian jiu-jitsu at Binda Brazilian Jiu Jitsu; both schools are located in Haverhill, Mass.