JBL Control 321CT 12" Coaxial Ceiling Speaker with HF Compression Driver & 70V/100V Transformer
The JBL 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 seamlessly 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 90deg. coverage on a broadband basis.
Component features include a Kevlar reinforced low frequency cone for reliability, well-damped surround for smooth frequency response, high temperature voice-coil and a reduced distortion design through saturated-gap magnet geometry. The high frequency driver features a pure titanium diaphragm for high sensitivity and long life, with diamond surround for resonance control and ferro fluid for increased power handling.
The Control 321CT is easy to install. The innovative EZRail feature built into the metal baffle temporarily holds one side of the speaker baffle in place until the installer can affix the baffle to the backcan with screws. The removable multi-pin locking connector, with secure screw-down terminals, allows for pre-wiring the input wires for easy clip-on convenience during installation.
The transformer version Control 321CT comes with a pre-attached top quality, low saturation 68 Watt multi-tap transformer for use on 70V or 100V distributed speaker lines. To ensure long life and reliability, Control 321CT passes JBL's 100-hour torture power test. Nobody in the industry has more demanding reliability standards.
- Coaxial ceiling speaker with 1" HF compression driver and consistent 90deg. broadband pattern control
- Built-in 70V/100V multi-tap transformer; 7.5W/15W/30W/60W 70V taps, 15W/30W/60W 100V taps
- 12" Kevlar-reinforced cone with 2" voice coil
- 250-watt power handling with high sensitivity and high SPL capability
- Advanced high-slope crossover network for constant coverage and natural midrange
- Baffle equipped with EZRail(TM) feature, holds baffle in place while securing to backcan with screws
- Removable multi-pin locking connector with screw-down terminals for simplified pre- or re-wiring during installation
- Recommended for applications requiring speech and vocal clarity, extended frequency response for foreground and background music
| Frequency Range (-10 dB) |
34 Hz - 18 kHz |
| Frequency Response (±3 dB) |
47 Hz - 16 kHz |
| Coverage Pattern |
90Deg. conical, broadband (Avg 1k - 16kHz) |
| Directivity Factor (Q) |
8.7 (1k - 16kHz) |
| Directivity Index (DI) |
9.4 dB (1k - 16kHz) |
| Long-Term System |
250 W (1000 W peak), 2 hrs |
| Power Rating, IEC |
200 W (600 W peak), 100 hrs |
| Sensitivity (2.83V@ 1m) |
94 dB4 measured half-space
99 dB5 computed for competitive comparison |
| Maximum SPL |
118 dB cont ave (124 dB peak) |
| Crossover Network |
1.8 kHz, 3rd order (18 dB/oct) high-pass plus conjugate to HF, 2nd order low-pass to LF. |
| Transformer Taps |
70V: 68W, 34W, 17W, 8.5W
100V: 68W, 34W, 17W |
| Transformer Insertion Loss |
0.9 dB typ. |
| Tap Connection |
Common
8.5W@70V, 17W@100V
17W@70V, 34W@100V
34W@70V, 68W@100V
68W@70V, n/c@100V |
| Low Frequency Driver |
Kevlar reinforced cone, 50 mm (2 in) voice coil |
| High Frequency Driver |
JBL 2412H-1 compression driver, 25 mm (1 in) voice coil. |
| Input Connector |
Removable locking connector with screw-down terminals
Max wire 12 AWG (2.5 mm2) |
| Baffle |
Metal, 366 x 366 mm (14.4 x 14.4 in), driver pre-mounted to baffle, ported, EZRail for easier installation to backbox |
| Grille Attachment to Baffle |
4 pcs 4 mm machine screws in corners |
| Dimensions (H x W x D) |
14.4 x 14.4 x 8.8" (366 x 366 x 223mm) |
| Weight |
16 lb (7.3 kg) |
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