The JBL CB8SA In-Ceiling Speaker Pre-Construction Bracket is designed to accompany the JBL Stage 280CSA in-ceiling speaker. This rectangular single bracket designed especially for convenience during new constructions & renovations streamlines the speaker installation process. The bracket is placed between joists before the ceiling has been skimmed marking the precise location for subsequent speaker installation. With this pre-construction bracket theres no need for board cutting after ceiling installation. Instead it facilitates easy cable routing & leaves an ideal speaker mount post-plastering. Experience a more straightforward & efficient installation with the JBL CB8SA in-ceiling speaker pre-construction bracket.