Control 328CT

8" Coaxial Ceiling Loudspeaker with HF Compression Driver

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8" Coaxial Ceiling Loudspeaker with HF Compression Driver

Control 328CT has been engineered from the ground up to deliver exceptional next-generation performance in a coaxial point source design ceiling loudspeaker.

Features

  • Consistent 120° broadband pattern control covers an extremely large area.
  • Shaped mounting baffle provides the pattern control of a 300 mm (12 in) horn from a 200 mm (8 in) driver.
  • Components
    • 200 mm (8 in) woofer with Kevlarreinforced cone and 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 very 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.

Downloads

  Version Language Size Uploaded
Control 300 Brochure
en updated: Jun 10, 2015
  en  2.9 MB Jun 10, 2015
Control 328C_CT Spec Sheet
en updated: Jun 10, 2015
  en  720 KB Jun 10, 2015
Control 328C-CT Backcan Assembly Instructions
en updated: Jun 10, 2015
  en  539 KB Jun 10, 2015
Control 300 Transformer Bypass
en updated: Jun 10, 2015
  en  59.2 KB Jun 10, 2015
Control 300 Transformer Insertion Loss
en updated: Jun 10, 2015
  en  15.4 KB Jun 10, 2015
Control 300 User Guide
en updated: Jun 10, 2015
  en  2.02 MB Jun 10, 2015
Specifications
Control 328C/CT Spec Sheet
updated: Apr 29, 2019
    720 KB Apr 29, 2019
Manuals
Transformer Bypass on Control 321CT, Control 322CT, or Control 328CT
updated: Oct 18, 2019
    59.2 KB Oct 18, 2019
Control 300 Series Transformer Insertion Loss Chart
updated: Oct 18, 2019
    15.4 KB Oct 18, 2019
Ceiling Speaker Accessory Guide
updated: Oct 18, 2019
    127 KB Oct 18, 2019
Brochures
Control 300 Brochure
updated: Apr 29, 2019
    2.9 MB Apr 29, 2019
CAD Drawings
Control 300 Ceiling Speakers
updated: Oct 18, 2019
    1.39 MB Oct 18, 2019
Bim Objects
BIM (Revit) Files
updated: Oct 03, 2019
    12.4 MB Oct 03, 2019
Compliances
JBL Control Series Passive Speakers DoC
updated: Dec 17, 2019
    179 KB Dec 17, 2019
Control 300 Series Declaration of Conformity
updated: Oct 18, 2019
    92.7 KB Oct 18, 2019
Software
Distributed System Design (DSD) v3.6.2
version 3.6.2, updated: Jan 14, 2020
3.6.2     805 KB Jan 14, 2020
User Guides
Control 300 User Guide
updated: Apr 29, 2019
    2.02 MB Apr 29, 2019
Install Guides
Control 328C/CT Assembly Guide
updated: Apr 29, 2019
    539 KB Apr 29, 2019
Speaker Tunings
Commercial, CBT, and AWC Tunings 181030
updated: Feb 24, 2020
    557 KB Feb 24, 2020

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Specifications

Frequency Response (-10dB) 45 Hz – 18 kHz
Power Rating See transformer taps
Transformer Taps 68W, 34W, 17W, (& 8.5W @ 70V)
Frequency Response (±3 dB) 60Hz – 16 kHz
Coverage Angle 120° conical, constant directivity
Impedance 8 ohms
Directivity Factor (Q) 7.0 (Avg 1k - 16kHz)
Directivity Index (DI) 8.5dB (Avg 1k - 16kHz)
Sensitivity 93 dB (1 kHz - 16 kHz)
Maximum SPL (1m) 118 dB (top 70V/100V tap)
Crossover Network 1.9 kHz, 3rd order (18 dB/oct) high-pass plus conjugate
Dimensions (H x W x D) 305 mm (12.0 in.) diameter round baffle x depth from back of baffle of 218 mm (8.6 in)
Input Connectors Screw locking barrier strip for bare wire
Drivers LF Driver: 200 mm (8 in)
HF Driver: compression driver, 25 mm (1 inch) coil
Color White
Safety Agency Suitable for use in air handling spaces per UL1480, UL2043, NFPA90 & NFPA 70 when installed with UL listed backcan such as JBL MTC-300BB8. S7232/UL Listed, Signaling Speaker. Transformer UL registered per UL1876. In accordance with IEC60849/EN60849.
Backcan formed steel (wood-lined; accessory)
Baffle/Rim Metal, round, driver pre-mounted to baffle, ported.
Ceiling Cutout Size 310 mm (12.2 in) diameter (for MTC-300BB8 backcan)
Included Accessories Ported baffle pre-attached, plus transformer on 328CT.
Optional Accessories MTC-RG6/8 Grille, round contoured, white. MTC-SG6/8 Grille, square, contoured, white. MTC-300BB8 Backbox, 25 liters (1 cubic feet)
Plenum Usage Yes, with accessory backcan

Accessories

MTC-RG6/8 | Round Grille for Control 200 and Control 300 Series
MTC-RG6/8 Main photo
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Round Grille for Control 200 and Control 300 Series

 

  • Rugged 19 gauge metal construction for enduring reliability.
  • Sculpted design for an elegant appearance and perfect for any decor or architectural setting.
  • Zinc underplating provides a rust and scratch resistant surface for years of maintenance free wear.
  • Powder coat final finish minimizes scratching and can easily be repainted to match any room color.

Documentation
MTC-SG6/8 | Square Grille for Control 200 and Control 300 Series
MTC-SG6/8 Main photo
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Square Grille for Control 200 and Control 300 Series

 

  • Rugged 19 gauge metal construction for enduring reliability.
  • Sculpted design for an elegant appearance and perfect for any decor or architectural setting.
  • Zinc plating provides a rust and scratch resistant surface for years of maintenance free wear.
  • Powder coated paint finish minimizes scratching and can easily be repainted to match any room color.

Documentation
MTC-TB6/8 | Tile Bridge for Control 200 and Control 300 Series
MTC-TB6/8 Main photo
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Tile Bridge for Control 200 and Control 300 Series

 

  • Robust 18-gauge steel construction with an epoxy based powdercoat finish.
  • Over-The-Grid design reduces sound transmission to ceiling grid thereby minimizing rattle.
  • 310 mm (12.2 inch) opening accommodating both Control 328C/CT and Control 227C/CT models.
  • Fits 610 mm (24 inch) and 600 mm (23.6 inch) tile grids.

Documentation
MTC-300BB8 | 1 Cubic Ft. Backcan for Control 300 Series 8 in. Drivers
MTC-300BB8 Main photo
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1 Cubic Ft. Backcan for Control 300 Series 8 in. Drivers

Professional Series

  • Extra-thick 16 gauge metal construction.
  • Lined with 12 mm (½ inch) thick MDF to eliminate resonances and to provide extra bass response.
  • Knockouts on top and side.

Documentation
MTC-300T150 | 150 Watt Transformer
MTC-300T150 Main photo
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150 Watt Transformer

For use on either 70V or 100V distributed loudspeaker lines.


Documentation

Support/FAQs