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.
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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
Documents
| Size | |
Control 300 Brochure
updated: Apr 2026
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2.9 MB |
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Control 328C_CT Spec Sheet
updated: Apr 2026
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720 KB |
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Control 328C-CT Backcan Assembly Instructions
updated: Apr 2026
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539 KB |
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Control 300 Transformer Bypass
updated: Apr 2026
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59.2 KB |
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Control 300 Transformer Insertion Loss
updated: Apr 2026
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15.4 KB |
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Control 300 User Guide
updated: Apr 2026
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2.02 MB |
Specifications
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720 KB |
Manuals
| Size | |
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59.2 KB |
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15.4 KB |
Brochures
| Size | |
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23 MB |
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2.9 MB |
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21 MB |
CAD Drawings
| Size | |
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1.39 MB |
Compliances
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179 KB |
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92.7 KB |
Software
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612 KB |
User Guides
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2.02 MB |
Ease Files
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1.08 MB |
Accessories
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570 KB |
Speaker Tunings
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557 KB |
Install Guides
| Size | |
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539 KB |
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Parts & Service
Specifications
| Frequency Range (-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
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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
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MTC-RG6/8 Spec Sheet
[79.8 KB]
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Control 227C Install Sheet
[590 KB]
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MTC-RG6/8 Hi Res Photo
[212 KB]
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Brackets Declaration of Conformity
[141 KB]
MTC-SG6/8 | Square Grille for Control 200 and Control 300 Series
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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
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MTC-SG6/8 Spec Sheet
[557 KB]
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MTC-SG6/8 Hi Res
[337 KB]
MTC-TB6/8 | Tile Bridge for Control 200 and Control 300 Series
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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
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MTC-TB6/8 Spec Sheet
[530 KB]
MTC-300BB8 | 1 Cubic Ft. Backcan for Control 300 Series 8 in. Drivers
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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
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MTC-300BB8 Spec Sheet
[2.71 MB]
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Accessing the Conduit Knockouts
[116 KB]
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Control 300 Ceiling Speaker Backboxes / Backcans
[1.1 MB]
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Control 300 Ceiling Speakers
[1.39 MB]
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JBL Brackets
[152 KB]
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Brackets Declaration of Conformity
[141 KB]
MTC-300T150 | 150 Watt Transformer
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150 Watt Transformer
For use on either 70V or 100V distributed loudspeaker lines.
Documentation
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MTC-300T150 Spec Sheet
[220 KB]
News
April 04, 2023
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Consultant Support