The JBL's CONTROL 14C/T is a two-way 4" coaxial ceiling loudspeakers that designed for a wide range of medium volume applications. A 4" (100mm) high-tech cone driver and a 19mm soft-dome, liquid-cooled tweeter are installed in a vented, paintable baffle constructed of UV-resistant UL94-V0 and UL94-5HB material, together with a pre-attached blind-mount backcan for quick and easy installation. The 120° coverage ensures that sound quality is consistent for listeners on and off axis. This public address system has high-temperature anodized aluminium voice coil former and high-temperature grade voice coil in the 4" (100mm) low-frequency driver provide steady performance and reliability under long-term, high-power working conditions. The butyl rubber surround ensures long-term durability and good acoustic damping, while the polypropylene cone resists moisture and water.