JBL Control 321C 12" 2-Way 250W Coaxial Ceiling Speaker (Each)
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Quick Overview
- 12" Woofer with Kevlar-Reinforced Cone
- High-Frequency Compression Driver
- 250W Program (1000W Peak) Power Capacity
- For Power Amplifiers
- 47 Hz to 16 kHz Frequency Response
PRODUCT OVERVIEW
12 in. Coaxial Ceiling Loudspeaker with HF Compression Driver
The JBL Control 321C is a passive 12" coaxial ceiling speaker designed for voice amplification and foreground music reproduction in waiting rooms, offices, retail stores, and restaurants. When driven by a low-impedance power amplifier (available separately), this 2-way speaker provides a long-term power capacity of 250W (1000W peak). The Control 321C is equipped with a durable 12" Kevlar-reinforced cone and a titanium-diaphragm compression driver, yielding an extended frequency response of 47 Hz to 16 kHz.
The cone, which also serves as a waveguide, results in reliable 90° broadband coverage, while the built-in crossover network ensures proper frequency distribution to the speaker components. A removable locking connector with screw-down terminals ensures simple wiring for the input and loop output.

Features
- Consistent 90° broadband pattern control.
- Components
- • A 300 mm (12 in) woofer with a Kevlar-reinforced cone with a 50 mm (2 in) voice coil.
- 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.
- The clean, contemporary grille and optional backbox are available.
| Product Name | JBL Control 321C 12" 2-Way 250W Coaxial Ceiling Speaker (Each) |
|---|---|
| Weight | 7.300000 |
| Frequency Response | 47 Hz – 16 kHz |
| Frequency Range | 34 Hz – 18 kHz |
| Power Capacity | For 2 Hours: 250 W (1000 W Peak) For 100 Hours: 200 W (800 W Peak) |
| Maximum SPL | 118 dB Continuous Average (124 dB Peak) |
| Impedance | 5.6 Ohms |
| Sensitivity (SPL / 1 W @ 1 m) | 94 dB (1 kHz - 16 kHz) |
| Mounting | Ceiling |
| Dimensions | 366 x 366 mm (14.4 x 14.4 in) square baffle x depth from back of baffle of 223 mm (8.8 in) on 321C & 240 mm (9.5 in) on 321CT. |
| Manufacturer | JBL |
| Color | Black |
| Country of Origin | United States |
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