The JBL MTC-300BB8 is a heavy-duty, one cubic foot back-can enclosure specifically engineered for housing the 8-inch transducer assemblies of the JBL Control 300 series ceiling loudspeakers in professional architectural installations. This back-can serves as the critical structural and acoustic foundation, providing a rigid, sealed enclosure that optimizes the low-frequency performance and overall sonic integrity of the installed loudspeaker. Its primary function is to create a compliant, plenum-rated mounting solution that integrates seamlessly into building construction, allowing for a flush, finished ceiling appearance while ensuring the speaker operates within its designed acoustic parameters for maximum performance and reliability.

Constructed from galvanized steel, the back-can is built to withstand the demands of commercial environments and meet fire code requirements for plenum air spaces. Its precise one cubic foot internal volume is acoustically tuned to match the specific Thiele-Small parameters of the compatible 8-inch drivers, ensuring proper bass response and system damping. The design includes a secure mounting interface for the transducer assembly, integrated cable management features, and a gasket seal to prevent air leaks that could compromise sound quality. The back-can is installed during the rough-in phase of construction, typically being suspended from or fastened to structural ceiling members before the ceiling surface is applied.

This accessory is an essential component for system integrators and contractors implementing high-performance, invisible audio systems in new construction or major renovations. By providing a dedicated, manufacturer-engineered enclosure, the MTC-300BB8 ensures that the transducer is installed in an optimal acoustic environment, protecting it from insulation, debris, and air movement within the plenum. It guarantees that the final installation not only meets aesthetic and code requirements but also delivers the full acoustic potential of the Control 300 series loudspeakers, resulting in a professional, durable, and high-fidelity outcome.