-ATC SCM11 Entry Series Speakers

Designed for small to medium scale stereo and multi-channel applications, the new ATC SCM11 incorporates a wholly ATC designed and built tweeter, and a stylishly curved cabinet.

Featuring the new ATC designed and built 25mm soft dome tweeter, updated bass/mid drivers and crossovers housed in a curved, laminated cabinet, the first of a new range of ATC closed-box passive loudspeakers has arrived. Along with the smaller SCM7, the SCM11 is the first to employ ATC's landmark SH25-76 tweeter, developed to satisfy the company's long-established rigour in drive unit engineering.

Sharing technology with the renowned ATC soft domed mid-range drive unit, the new SH25-76 tweeter employs a unique dual suspension system suppressing 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 its operating band and removes the need for ferrofluids, which can dry out over time, compromising performance.

A complex, shaped, soft-domed diaphragm extends high frequency range and offers a smooth off-axis response. The tweeter's 15,000 gauss (1.5 tesla) neodymium magnet has a black heat-treated top plate, which dissipates heat away from the voice coil to maintain high power handling and low power compression. A precision-machined 5.5mm rigid alloy waveguide provides optimum dispersion, a flat on-axis frequency response and resonance-free operation.

Establishing what is to be a new style for ATC's most competitively priced range of loudspeakers, the new SCM11 benefits acoustically and aesthetically from a curved cabinet construction. Braced and laminated for high rigidity and damping, the curved enclosures in real cherry or black ash veneer also impart a strong impression of design quality. Improved crossovers featuring metallised polypropylene capacitors, large air cored inductors and ceramic wire-round resistors offer superior power handling and clarity. The SCM11 exhibits an impedance curve free from low values, presenting an easy load for amplifiers of 75 to 300 watts. The SCM11 is designed for optimum performance without the grille - although a full-length perforated metal grille, finished in anthracite grey to match the drive unit face plates, is supplied. According to tradition, each model number represents internal cabinet volume in litres.

The new SCM11 features ATC’s SH25-76 with an ATC CLD 150mm mid-bass driver incorporating a 45mm soft dome. Constrained Layer Damping is a driver cone technology exclusive to ATC and represents a step-change in driver-to-system performance. Advantages include reduced harmonic distortion between 300Hz and 3 kHz, an extended frequency response that eases constraints on the crossover filter slope, and improved off-axis response.

New ATC designed and built 25mm soft dome HF unit with precision alloy wave guide.

“CLD” driver technology with 45mm integral soft dome.

In-house, hand-wound precision flat wire coil.

Precision undercut bass pole.

Massive optimised motor assembly.

Flat impedance curve allowing easy load for amplifiers.