The Apart CMBB is a surface mount back-box designed for the CM6T/CM6E/CM20T & CM608 Ceiling Speakers. Due to the conical shape, the CMBB will perfectly fit and stick into a concrete or brick wall. The CMBB can also be used as an on-wall/on-ceiling back-box ideal for environments where speakers cannot be recessed into the ceiling. Mounting the CMBB is very easy! First the base is mounted on the wall or ceiling. Then the back-box can be fitted on the base plate by turning the ring counter-clockwise. The ring can be secured by 3 included screws. Afterwards the loudspeaker can be mounted into the back-box. Apart CMBB Key Features: Back-box for Apart build-in speakers CM6T, CM6E, CM20T The CMBB will perfectly fit and stick into a concrete or brick wall CMBB can also be used as an on-wall back-box Simple installation with intuitive design The standard colour is white