Control 328CT has been engineered from the ground up to deliver exceptional next-generation performance in a coaxial point source design ceiling loudspeaker. The combination of the low frequency cone and the shaped mounting baffle 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 wide, extremely consistent 120° coverage on a broadband basis.
JBL Control 328CT Features
- Extraordinary clarity for speech and vocals with extended frequency response for music
- 250 Watt power handling with very high sensitivity provides high SPL capability
- Advanced high-slope crossover network for constant coverage and smooth, natural midrange
- Consistent 120° broadband pattern control covers an extremely large area
- Shaped mounting baffle provides the pattern control of a 300 mm (12 in) horn from a 200 mm (8 in) driver
- Transformer Taps:
- 70V: 68W, 34W, 17W, 8.5W
- 100V: 68W, 34W, 17W
- Components
- 200 mm (8 in) woofer with Kevlarreinforced cone and 50 mm (2 in) voice-coil
- 25 mm (1" exit) compression driver
- Control 328CT Ceiling Speaker with HF Compression Driver1
- Ported baffle pre-attached1
- Plus transformer on 328CT1
- Frequency Range (-10dB) 45 Hz – 18 kHz
- Power Rating See transformer taps
- Transformer Taps 68W, 34W, 17W, (& 8.5W @ 70V)
- Frequency Response (±3 dB) 60Hz – 16 kHz
- Coverage Angle 120° conical, constant directivity
- Impedance 8 ohms
- Directivity Factor (Q) 7.0 (Avg 1k - 16kHz)
- Directivity Index (DI) 8.5dB (Avg 1k - 16kHz)
- Sensitivity 93 dB (1 kHz - 16 kHz)
- Maximum SPL (1m) 118 dB (top 70V/100V tap)
- Crossover Network 1.9 kHz, 3rd order (18 dB/oct) high-pass plus conjugate
- Dimensions (H x W x D) 305 mm (12.0 in.) diameter round baffle x depth from back of baffle of 218 mm (8.6 in)
- Input Connectors Screw locking barrier strip for bare wire
- Drivers
- LF Driver: 200 mm (8 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-300BB8. S7232/UL Listed, Signaling Speaker. Transformer UL registered per UL1876. In accordance with IEC60849/EN60849.
- Backcan formed steel (wood-lined; accessory)
- Baffle/Rim Metal, round, driver pre-mounted to baffle, ported.
- Ceiling Cutout Size 310 mm (12.2 in) diameter (for MTC-300BB8 backcan)
