JBL MTC-81TB8 Pre-Install In-Ceiling Tile Bridge for Pre-Install Backbox, 4 Pack

The JBL MTC-81TB8 tile bridge is designed for use in applications requiring pre-installed backcans in suspended ceiling applications and is compatible with ceiling speakers having a 286 mm (11-1/4") mounting circle diameter, such as the JBL 8138 ceiling loudspeaker and the JBL MTC-81BB8 pre-install backbox. The MTC-81TB8 is constructed with four thru-holes for attaching screws to backbox and four holes with clip nuts for the speaker attachment screws.