JBL Professional JBL Control 321C 12-inch coaxial in-ceiling loudspeaker

The Control 321C is a 12-inch coaxial point-source ceiling loudspeaker with a 300 mm Kevlar-reinforced woofer on a 50 mm voice coil and a 25 mm exit compression driver, crossed at 1.8 kHz. It holds a 90-degree conical pattern across the band, so a room can be covered with a predictable grid rather than by overlapping wide-pattern cans.

Response runs to 34 Hz at -10 dB and maximum output is 118 dB, at 94 dB sensitivity and 5.6 ohms. The metal baffle comes with the driver pre-mounted and ported. Ceiling cutout is 378 x 378 mm for the MTC-300BB12 backcan, which is an accessory - fit it if the space is a plenum. Termination is a screw-locking barrier strip for bare wire.