JBLControl 321CT

12 in. Coaxial Ceiling Loudspeaker with HF Compression Driver

12 in. Coaxial Ceiling Loudspeaker with HF Compression Driver

The Control 321CT has been engineered from the ground up to deliver exceptional next-generation performance in a coaxial point source design ceiling loudspeaker.


·       Consistent 90° broadband pattern control.

·       Components

o   300 mm (12 in) woofer with Kevlar-reinforced cone with 50 mm (2 in) voice-coil.

o   25 mm (1 exit) compression driver.

·       Extraordinary clarity for speech and vocals with extended frequency response for music.

·       250 Watt power handling with high sensitivity provides high SPL capability.

·       Advanced high-slope crossover network for constant coverage and smooth, natural midrange.

·       Clean, contemporary grille and optional backbox available.


Frequency Range (-10 dB)

34 Hz – 18 kHz

Power Rating

200 W (600 W peak), 100 hrs


70V: 68W, 34W, 17W, 8.5W

100V: 68W, 34W, 17W

Frequency Response (±3 dB)

47 Hz – 16 kHz

Coverage Pattern

90° conical, broadband (Avg 1k - 16kHz)

Directivity Factor (Q)

8.7 (1k - 16kHz)

Directivity Index (DI)

9.4 dB (1k - 16kHz)

Sensitivity (2.83V@ 1m)

94 dB measured half-space

99 dB computed for competitive comparison

Crossover Network

1.8 kHz, 3rd order (18 dB/oct) high-pass plus conjugate to HF, 2nd order low-pass to LF

Dimensions (H x W x D)

366 x 366 mm (14.4 x 14.4 in) square baffle x depth from back of baffle of 240 mm (9.5 in)