Control 321CT has been engineered from the ground up to deliver exceptional next-generation performance in a coaxial point source design ceiling loudspeaker. The low frequency cone performs as a true 12 inch (300 mm) diameter waveguide for the high frequencies. A unique metal throat transitions seemlessly to the horn to eliminate high frequency beaming which is common among this category of speaker. The result is a coaxial speaker with extremely consistent 90° coverage on a broadband basis.
JBL Control 321CT Features
- Consistent 90° broadband pattern control
- 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
- Transformer Taps
- 70V: 68W, 34W, 17W, 8.5W
- 100V: 68W, 34W, 17W
- Components
- 300 mm (12 in) woofer with Kevlar-reinforced cone with 50 mm (2 in) voice-coil
- 25 mm (10 exit) compression driver
- Control 321CT Coaxial Ceiling Speaker1
- Ported baffle pre-attached1
- Transformer on 321CT1
- Frequency Range (-10dB) 34 Hz – 18 kHz
- Power Rating IEC Long-Term System Power Rating: 250 W continuous pink noise (1000 W peak), 2 hrs 200 W continuous pink noise (800 W peak), 100 hrs
- Transformer Taps 68W, 34W, 17W, (& 8.5W @ 70V)
- Frequency Response (±3 dB) 47 Hz – 16 kHz
- Coverage Angle 90° conical, constant directivity
- Directivity Factor (Q) 8.7 (1k - 16kHz)
- Directivity Index (DI) 9.4 dB (1k - 16kHz)
- Sensitivity 94 dB (1 kHz - 16 kHz)
- 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)
- Maximum SPL (1m) 118 dB (top 70V/100V tap)
- Input Connectors Screw locking barrier strip for bare wire
- Drivers
- LF Driver: 300 mm (12 in)
- HF Driver: compression driver, 25 mm (1 inch) coil
- Color White
- Safety Agency Suitable for use in air handling spaces per UL1480, UL2043, NFPA90 & NFPA 70 when installed with UL listed backcan such as JBL MTC-300BB12. S7232/UL Listed, Signaling Speaker. Transformer UL registered per UL1876. In accordance with IEC60849/EN60849.
- Backcan formed steel (wood-lined; accessory)
- Baffle/Rim Metal, driver pre-mounted to baffle, ported.
- Ceiling Cutout Size 378 x 378 mm (14.9 x 14.9 in) (for MTC-300BB12 backcan)
- Plenum Usage Yes, with accessory backcan
