Uniting the benefits of a compact size and wider bandwidth with the improved phase coherence, response speed and dynamics of active operation, the new SCM20ASL speakers from ATC feature a sealed cabinet design that ensures well controlled bass even in smaller spaces and/or when located close to walls. Integrating a 2-way active system within a 20-litre stand-mount cabinet, the new model features ATC’s proprietary 6” Super Linear Mid/Bass driver and 1” S-Spec dual-suspension tweeter, powered by on-board class A/B MOSFET power amplifiers capable of delivering 200W and 50W continuous power to the bass and HF drivers respectively.
The Mid/Bass driver employs a large 3” voice coil and short-coil (long-gap) motor assembly featuring ATC’s proprietary SL motor technology, which reduces distortion from the upper bass into the midrange. ATC’s 25mm S-Spec soft-dome tweeter features a dual-suspension and very high energy 2.1 tesla motor combining to deliver an extended response well beyond 20kHz with exceptional reproduction of fine detail.
ATC believes that the best results in a multi-way loudspeaker system will only be realized if implemented as an active design. This allows designing more accurate crossovers due to fixed filter ‘load’, but also a wider choice of crossover type/shape due to active line level operation with greater dynamic range due to elimination of passive crossover losses. Ideally matched amps are also a more efficient use of amplifier power, providing a more direct connection to the drivers with lower electrical resistance, and lower inter-modulation distortion due to reduced amplifier operating bandwidth.
For that reason, the crossovers in the SCM20ASL speakers are active, analog 2nd order Linkwitz-Riley operating at line-level for maximum efficiency, while an all-pass filter is included to optimize the phase response through the crossover region, resulting in far improved tonal balance and imaging.
Input to the loudspeaker is via balanced XLR, located on the rear panel and there are user controls for input sensitivity and low frequency shelf cut and boost. The input sensitivity control allows the user to tailor the input gain to suit their source and pre-amplifier combination for more consistent performance. The low frequency shelf control gives the user the option to subtly adjust the bass response to suit their room.
The SCM20ASL cabinet features a combination of bracing for stiffness and damping to suppress resonance and is available in a wide range of real wood veneers, painted satin finishes and high gloss lacquers. Standard finishes include Cherry, Black Ash, Walnut and Oak veneers, Satin Black or Satin White paint. Premium finishes include Rosewood, European Crown Cut Walnut, Burr Magnolia, Pippy Oak, Burr Poplar veneers. The speaker is supplied with a removeable grille, wrapped in black acoustically transparent cloth.
Hand-built in England, these SCM20ASL are offered with a 6-year warranty and are available starting from April 2025, retailing for $9,999 per pair, in standard finishes or $10,999 per pair in the premium finishes, with additional $2,500 for high gloss finishes.
Located in Las Vegas, Nevada, Lone Mountain Audio is the exclusive U.S. distributor for ATC Loudspeakers for the Hi-Fi and CI (custom integration) markets.
www.lonemountainaudio.com
www.atcloudspeakers.co.uk
