The new ATC SCM20ASL 2-way stand-mount loudspeaker combines the benefits of compact size and wider bandwidth with the improved phase coherence, response speed, and dynamics of ATC active operation. The SCM20ASL is designed for small- to medium-sized listening environments. In addition, its sealed cabinet design ensures well-controlled bass even in smaller spaces or when located close to walls.

Integrating a 2-way active system within a 20-liter stand-mount cabinet, the new model features ATC’s proprietary 150mm/6-inch “Super Linear” Mid/Bass driver and 25mm/1-inch “S-Spec” dual-suspension tweeter, powered by on-board class A/B MOSFET power amplifiers capable of delivering 200 watts and 50 watts continuous power to the bass and HF drivers, respectively. The performance and power output of each power amplifier is carefully tailored to driver demands and the musical elements they reproduce.
The Mid/Bass driver employs a large 75mm/3-inch 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 a high energy 2.1 Tesla motor combining to deliver an extended response well beyond 20 kHz.
Crossovers 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.
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, or Burr Poplar veneers. The speaker is supplied with a removeable grille, wrapped in a black acoustically transparent cloth.
U.S. Retail Pricing
Standard Finishes (Cherry, Oak, Walnut, Black Ash, Black Satin, White Satin):
- $9999 pair/retail
Premium and High Gloss Finish (Rosewood, Burr Magnolia, Pippy Oak):
- $10,999 pr/retail – premium finish
- +$2,500 additional for high gloss
- $11,999 pr/retail – piano black or matte white
For more information, visit https://www.lonemountainaudio.com/loudspeakers/classic-series/scm20asl/.