ATC has introduced the SSM12i Pro and SSM25i Pro wall-/ceiling-mount passive studio monitors, introducing its new SSM (Studio Surface Monitor) series.
Making use of a shallow cabinet, proprietary mounting hardware and reinforced cabinetry these are offered to surround and immersive audio installations, especially in smaller control rooms – alongside R4-150 Pro, produced as a new four-channel power amplifier to complement.
The SSM12i Pro cabinet measures 147mm, while SSM25i Pro is slightly deeper at 198mm (mounted flat and including the mounting hardware in both cases).
They can be configured to mount either vertically (portrait) or horizontally (landscape) – useful when ceiling mounted as the acoustic source height is maximised while also creating greater clearance to the users in the control room below. They also feature a mounting system that fixes flat to a wall or ceiling and allows the cabinet to pivot away from the mounting surface so aiming the speaker towards the listening position, resulting in a superior response and more precise imaging.
The SSM12i Pro is built around proprietary drive units designed and manufactured by ATC and operating in a sealed cabinet. ATC’s SB45-150CLD 150mm/6-inch bass/mid driver is employed at low and mid-range frequencies, featuring a unique CLD (Constrained Layer Damping) cone, which effectively minimises cone breakup. The sealed cabinet design and a new crossover network, optimised via extensive computer modelling and listening tests, are engineered to deliver optimal performance when the loudspeaker is mounted on/close to a hard wall/surface. For frequencies above the 2.2kHz crossover point, ATC’s SH25-76 25mm/1-inch dual-suspension tweeter ensures precise and transparent reproduction of high-frequency content.
For larger spaces, the SSM25i Pro features three proprietary ATC drive units also housed in a sealed cabinet design. Using a short coil/long gap design and paper/carbon fibre cone, ATC’s SB50-164SC 164mm/6.5-inch bass driver provides extended low-frequency extension from 47Hz to 380Hz. Meanwhile, midrange frequencies are handled by ATC’s SM75-150 75mm/3-inch midrange dome.
High frequencies above 3.5kHz are reproduced by an ATC SH25-76S ‘S-Spec’ tweeter. This 25mm/1-inch soft dome tweeter incorporates a dual-suspension design allowing the coil to operate within the tight tolerance of an air-cooled magnetic gap.
As a result of the integration of these drive units within that sealed cabinet design, SSM25i Pro is suited to multichannel and immersive audio applications in medium to large control rooms, including those requiring Dolby Atmos or other immersive audio setups. SSM25i Pro – like SSM12i Pro – features an all-new crossover network, engineered to deliver optimal performance when the loudspeaker is mounted on/close to a hard wall/surface.
The new models are designed to work with ATC’s existing professional product range. Installation is simplified via the drilling templates included with the products, and the mounting hardware itself is straightforward and very robust.
In its landscape orientation, SSM12i Pro measures 490mm (W) x 147mm (D) x 315mm (H), and weighs 14.8kg/32.6lbs; by comparison, SSM25i Pro measures 740mm (W) x 198mm (D) x 380mm (H) and weighs 28.2kg/62.2lbs. As a result of the size and weight of the two new loudspeakers, installation must be handled by a qualified professional.
ATC is also announcing availability of R4-150 Pro as a new four-channel, 5U-high/19-inch power amplifier to compliment the loudspeakers. This shares technology with ATC’s P1 Pro dual-mono power amplifier courtesy of four toroidal transformers. The 5U-high chassis saves 2U of rack space over two P1 Pro. Put it this way: R4-150 Pro is capable of 150W continuous output from each of its four channels (benefitting from class-A/B Mosfet output stages) for the dynamic content found in immersive mixes. It also features ultra-high CMRR low-noise balanced inputs via four XLR while the output connections are via four Neutrik NL4. With fan-less convection cooling, R4-150 Pro operates silently, while thermal and DC offset protection and remote power on/off trigger inputs allow flexible and reliable installation.
More: https://atc.audio/professional/studio-surface-monitors/ssm25i-pro