ATC launched the SCM19AT Active Tower loudspeaker system.

ATC launched the SCM19AT Active Tower speaker system.

Source: Press Release, Last Accessed: 2016/03/02

ATC Loudspeaker Technology’s new SCM19 Active Tower speaker system will deliver the company’s reference-quality audio from an elegantly curved floor-standing design, just 370mm wide and under a meter in height.
Identical acoustically to ATC’s award-winning passive SCM19 2-way system but utilizing the 19 liter volume in a slim tower format, the SCM19AT combines high aesthetic appeal with the widely acknowledged performance benefits of ATC active design to create a compelling speaker proposition for music lovers, the company says. The SCM19AT’s braced, sealed and curved multi-layer laminated cabinet, which is precision-finished in cherry or black ash real wood veneer, provides a rigid and optimally damped environment for the Company’s acclaimed SH25-76 soft dome tweeter and 150mm Super-Linear mid/bass driver. Drive units are individually powered by an upgraded bi-amp pack, comprising ATC’s discrete MOSFET Class A/B modules, providing 32W of continuous power to the HF section and 150W to the bass.
Sharing technology with the renowned ATC soft domed mid-range drive unit, the 19AT’s tweeter employs a unique dual suspension system, designed to suppress rocking modes even at high power output levels. The ATC configuration of a short edge-wound voice coil in a long, narrow magnetic gap ensures exceptionally low distortion throughout the tweeter’s operating band and removes the need for ferrofluid, while a precision-machined 5.5mm rigid alloy waveguide provides optimum dispersion with a flat on-axis frequency response and resonance- free operation.
The SCM19AT’s 150mm ATC SL mid/bass driver utilizes a carefully weighted doped fabric cone with a 75mm soft dome - exceptional for its broad and even dispersion of mid-band frequencies. The cone is driven by an underhung (short coil/long gap) motor using a huge 9kg Super Linear magnet system, which is unique to ATC loudspeaker systems.
The 19AT’s proprietary two-way on-board amp pack design has been revised to reduce noise and distortion (a further -10dB @ 10kHz), while achieving a lower operating temperature for improved reliability. The design includes protection circuits for both DC offset and thermal overload. Mid frequency THD is extremely low, at 0.002%/93dB, and a very wide bandwidth of 200 kHz ensures the accurate reproduction of musical transients. ATC’s Grounded Source output stage modules are fed by a newly developed two-way active crossover section featuring 2nd order modified Butterworth circuitry with phase compensation for each crossover point. As usual, system input is via balanced XLR. The ATC SCM19AT – the first active 19 in the company’s history - is designed for optimum performance with the grille attached, although the difference in performance without the grill is minimal. Finished in anthracite gray, the metal grille fixes to the cabinet via hidden magnets. Like all ATC products, the SCM19AT is backed by a six-year warranty.

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