JBL CONTROL321C Premium 12" Coaxial Ceiling Speaker

Manufacturer: JBL ProSku: CONTROL321C
Special order only. Please contact us for shipping times.
Price: NZ$1,448.00

Freight $10 per order to main centres.
+ extra $5 if Rural Delivery.

JBL CONTROL321C Premium 12" Coaxial Ceiling Speaker.
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 90º 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 1/2” medium density fiberboard 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 60 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.


  • 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.
  • System:
  • Frequency Range (-10 dB): 34 Hz – 18 kHz
  • Frequency Response (±3 dB): 47 Hz – 16 kHz
  • Coverage Pattern: 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, IEC: 150 W (600 W peak), 100 hrs
  • Sensitivity (2.83V@ 1m):
    94 dB measured half-space
    99 dB 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.
  • Nominal Impedance (321C): 8 ohms
  • Transformer Taps(321CT): 70V: 60W, 30W, 15W, & 7.5W 100V: 60W, 30W & 15W
  • 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) 7.5W@70V, 15W@100V
    C) 15W@70V, 30W@100V
    D) 30W@70V, 60W@100V
    E) 60W@70V, n/c@100V
  • Safety Agency Rating: In accordance with IEC60849 / EN60849, Transformer in CT model
    UL Listed per UL1876
  • Baffle: Metal, 366 x 366 mm (14.4 x 14.4 in), driver pre-mounted to baffle, ported, EZRail™ for easier installation to backbox.
  • Baffle Attachment to MTC-300BB12 Backbox: Attach via either 4 corner holes M4 x 14 mm machine screws, or 6 side/end holes #10 x 0.5 in (12 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.

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