The HY-BC1 Back Can (suspension) is a metal case that can be attached to a flush-mount ceiling speaker when mounted in exposed applications. Ideal for TOA’s F-122C, F-2322C, F-2352C or F-2352SC. With 4 knockouts on the side, it permits the Electrical Contractor to install the Back Can prior to the speaker installation by connecting and pulling the cables. The HY-BC1 could also be used in exposed ceiling and can be hung from a ceiling suspension pipe.