JBL Control 328CT 8" Coaxial Ceiling Loudspeaker with HF Compression Driver
The Control 328CT is a 8" coaxial ceiling loudspeaker with HF compression driver, from the Control Contractor installed range. Transducers are LF Driver: 200 mm (8 in) HF Driver: compression driver, 25 mm (1 inch) coil. Nominal coverage is 120 degrees conical, constant directivity. Frequency range is 45 Hz - 18 kHz. JBL rates it at See transformer taps. Maximum SPL at 1 m is 118 dB (top 70V/100V tap).
Transformer taps are 68W, 34W, 17W, (& 8.5W @ 70V). Connections are Screw locking barrier strip for bare wire. It measures 305 mm (12.0 in.) diameter round baffle x depth from back of baffle of 218 mm (8.6 in). In the box: Ported baffle pre-attached, plus transformer on 328CT.
| Type | 8" Coaxial Ceiling Loudspeaker with HF Compression Driver |
|---|---|
| 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 degrees conical, constant directivity |
| Impedance | 8 ohms |
| Directivity Factor (Q) | 7.0 (Avg 1k - 16kHz) |
| Directivity Index (DI) | 8.5dB (Avg 1k - 16kHz) |












