Description
The JBL Control 321C has been engineered from the ground up to deliver exceptional next-generation performance in a coaxial point source design ceiling loudspeaker.
Product Specifications:
Frequency Range (-10dB): 34 Hz – 18 kHz
Sensitivity: 94 dB (1 kHz - 16 kHz)
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)
Crossover Network: 1.8 kHz, 3rd order (18 dB/oct) high-pass plus conjugate to HF
Impedance: 5.6 ohms
Dimensions (H x W x D): 366 x 366 mm (14.4 x 14.4 in)
Maximum SPL (1m): 118 dB (124 dB peak)
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
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
Financing Options
Hassle-Free Financing Available
Get the gear you need now and pay over time. Perfect for working DJs, artists, and sound pros who need pro-grade speakers, lighting, and cases to stay competitive.
- Shop Pay & Afterpay for instant financing right at checkout
- Acima, Synchrony, Progressive & Snap lease-to-own and financing options
- Fast approvals so you buy today and pay monthly
Military & First Responder Discounts
We're proud to support those who serve. Active-duty military, veterans, and first responders qualify for a special discount on your gear. See our Military Discount details here and how to redeem.

