ATC’s new studio monitors offer shallow cabinet depths and “target surround and immersive audio installations”ATC has launched a new line of passive studio monitors, its SSM (Studio Surface Monitor) series, which offer reinforced cabinets with shallow depth and proprietary mounting hardware for surround and immersive audio setups.
The series consists of two variations of wall-/ceiling-mount passive studio monitors, the SSM12i Pro and SSM25i Pro, and the complementing R4-150 Pro – a new four-channel power amp. All three new additions are available now.

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The SSM12i Pro’s shallow speaker cabinet measures 147mm/5 13/16”, while SSM25i Pro’s is slightly deeper at 198mm/7 13/16”, and both can be configured to mount vertically or horizontally. Their mounting system fixes flat to a wall or ceiling and allows the cabinet to pivot away from the mounting surface.
The SSM12i Pro is built around proprietary drive units designed and manufactured by ATC and operating in a sealed cabinet. ATC’s advanced SB45-150CLD 150mm/6” bass/mid driver is employed at low and mid-range frequencies, featuring a unique CLD (Constrained Layer Damping) cone, which minimises cone breakup. For frequencies above the 2.2kHz crossover point, ATC’s SH25-76 25mm/1” dual-suspension tweeter ensures “precise and transparent reproduction” of high-frequency content.
Image: SSM12i Pro. Credit: ATC
SSM25i Pro is more suited to larger spaces, and is described by ATC as an ideal choice for multichannel and immersive audio applications in medium to large control rooms, including those requiring Dolby Atmos or other immersive audio setups. It features three proprietary ATC drive units also housed in a sealed cabinet.
Utilising a short coil/long gap design and paper/carbon fibre cone, ATC’s SB50-164SC 164mm/6.5” bass driver provides an extended and precise low-frequency output, from 47Hz up to 380Hz. Midrange frequencies are handled by ATC’s SM75-150 75mm/3” midrange dome, while high frequencies above 3.5kHz are reproduced by ATC’s advanced ATC SH25-76S ‘S-Spec’ tweeter.
The SSM12i Pro is priced at £2,167.00 per pair, while the SSM25i Pro is available at £4,667.00 per pair (both excluding VAT). The R4-150 Pro is available at £3,667.00 (excluding VAT and cables). Find out more over at ATC.
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