ATC Introduces SSM12i Pro and SSM25i Pro Wall-Mounted Passive Speakers for Professional Studios

The divergence between the two models is less about output and more about how the workload is distributed. The two-way SSM12i Pro places significant responsibility on its midbass driver, a layout that favors coherence and point-source behavior in near-to-midfield control rooms. By contrast, the three-way architecture of the SSM25i Pro offloads vocal-band and presence-region duties to a dedicated soft-dome midrange, a classic ATC move aimed at reducing intermodulation and maintaining low distortion at higher monitoring levels. This makes the larger model better suited to main monitor roles in broadcast or scoring environments where sustained level and tonal stability matter more than compactness.

Across sources, there is a shared emphasis on consistency rather than spectacle. Neither model chases ultra-high sensitivity or exaggerated bandwidth; instead, the designs assume high-quality power, careful system integration, and engineers who value repeatability from room to room. In that sense, the SSM12i Pro and SSM25i Pro feel less like new product categories and more like architectural tools—monitors intended to disappear into the build while leaving behind a familiar ATC sonic fingerprint: controlled dynamics, restrained voicing, and an almost stubborn refusal to flatter the mix.