CMB S2 is a ceiling-mount bracket designed for indoor installation of Bose Professional FreeSpace FS and DesignMax surface-mount loudspeakers on ceilings. It supports FS2SE, FS4SE, DM3SE, DM5SE, and DM6SE models and is available in black or white to match facility aesthetics. The mounting hardware carries product code 852581-0110 (CMB S2 Ceiling Mount Bracket S2), providing a dedicated solution for secure, flush ceiling mounting in commercial environments.