Description
The JBL‑MTC‑447MR is a mud‑ring construction bracket designed for use with JBL ceiling speakers in the Control 400 Series, specifically models like the Control 447C/T and Control 447LP. This bracket is used during commercial or professional audio installations to simplify mounting and wiring before ceiling finishes (such as drywall or plaster) are installed. It provides a secure structural guide and template for cutting the ceiling opening and positioning the speaker reliably within the ceiling space.