JBL Control 321C Ceiling Loudspeaker

JBL Control 321C Ceiling Loudspeaker
JBL Control 321C Ceiling Loudspeaker
Item# JBL-Control-321C
Availability: Usually ships the same business day

Product Description

JBL Control 321C Premium 12” Coax Ceiling Loudspeaker

Key Features:

Consistent 90° broadband pattern control.

Components • 300 mm (12 in) woofer with Kevlar-reinforced cone with 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.

Clean, contemporary grille and optional backbox available.


Control 321C and Control 321CT have 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 seemlessly 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 90ş coverage on a broadband basis. Component features include a Kevlarreinforced low frequency cone for reliability, well-damped surround for smooth frequency response, high temperature voicecoil 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 FerroFluid™ for increased power handling. The Control 321C and Control 321CT are easy to install. The innovative EZRail™ feature built into the metal baffl e temporarily holds one side of the speaker baffl e in place until the installer can affi x the baffl e 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 clean, contemporary look of the optional MTC-300SG12 square grille is designed to suit high-end venues, offering a simple, elegant appearance that fi ts into a wide variety of décors. The optional, best-in-class, MTC-300BB12 three cubic foot backcan is made of extra-thick 16 gauge steel and lined with ˝” medium density fi berboard to provide the performance of a top quality wood loudspeaker cabinet in a metal backbox form factor. 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 321C/CT passes JBL’s 100-hour torture power test. Nobody in the industry has more demanding reliability standards.


System: Frequency Range (-10 dB)1: 34 Hz – 18 kHz

Frequency Response (±3 dB)1: 47 Hz – 16 kHz

Coverage Pattern2: 90° 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, IEC3: 200 W (600 W peak), 100 hrs Sensitivity (2.83V@ 1m): 94 dB4 measured half-space 99 dB5 computed for competitive comparison

Maximum SPL6: 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.

Nominal Impedance (321C): 8 ohms

Transformer Taps (321CT): 70V: 68W, 34W, 17W, 8.5W 100V: 68W, 34W, 17W

Transformer Insertion Loss (CT): 0.9 dB typ.

Transducers: 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.

Physical: Input Connector (321C): Removable locking connector with screw-down terminals. Max wire 12 AWG (2.5 mm2)

321C: 1) + in 2) + loop out 3) – loop out 4) – in

Tap Connection (321CT): 321CT: A) Common B) 8.5W@70V, 17W@100V C) 17W@70V, 34W@100V D) 34W@70V, 68W@100V E) 68W@70V, n/c@100V

Safety Agency Rating: Suitable for use in air handling spaces, per U.L.-2043, U.L. 1480, NFPA90 & NFPA70A. In accordance with IEC60849 / EN60849, Transformer in CT model UL Listed per UL1876.

Baffl e: Metal, 366 x 366 mm (14.4 x 14.4 in), driver pre-mounted to baffl e, ported, EZRail™ for easier installation to backbox. Baffl e Attachment to Attach via either 4 corner holes M4 x 14 mm machine

MTC-300BB12 Backbox: screws, or 6 side/end holes #10 x .75 in (19 mm) sheet metal screws.

Grille Attachment to Baffl e: 4 pcs 4 mm machine screws in corners.

Dimensions (H x W x D): 366 x 366 mm (14.4 x 14.4 in) square baffl e x depth from back of baffl e of 223 mm (8.8 in) on 321C & 240 mm (9.5 in) on 321CT.

Net Weight: 321C: 7.3 kg (16.0 lbs) 321CT: 8.2 kg (18.0 lbs)

Shipping Weight: 321C: 8.8 lbs (19.4 lbs) 321CT: 9.8 kg (21.6 lbs)

Included Accessories: Ported baffl e pre-attached, transformer on 321CT.

Optional Accessories: MTC-300SG12 Grille, square contoured, white.

MTC-300BB12 Backbox, 80 liters (3 cubic feet)

MTC-300T150 Transformer, 150 W for use with 321C.