JBL MTC-300BB8 Backbox For 8" Control 300 Series Drivers
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- Brand new in original box
- Full JBL manufacturer's warranty
- Free shipping in the continental US
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- SKU
- MTC-300BB8
Description
JBL MTC-300BB8 Backbox For 8" Control 300 Series Drivers
The MTC-300BB8 is a professional-grade enclosure engineered to mount flush with suspended ceilings, providing the acoustic foundation needed for in-ceiling speaker installations in studios, control rooms, and broadcast facilities. Its compact footprint and robust construction make it the essential choice for integrators pairing JBL's 8-inch Control 300 drivers with properly tuned baffle designs.
Construction & Acoustic Design
Built from 16 gauge metal with 12 mm MDF lining, this backbox eliminates resonances and delivers extended bass response from relatively modest dimensions. The interior volume of 0.71 cubic feet is precisely engineered to complement the 8-inch driver's performance characteristics, providing a controlled acoustic environment without demanding excessive ceiling cavity space.
Installation & Workflow Integration
The 310 mm (12.2 in) ceiling cutout integrates seamlessly into standard drop-ceiling grids, while five knockout locations (one on top, four on sides) accommodate various cable routing configurations for flexible system layouts. Full certification under U.L.-2043, U.L.-1480, NFPA90, and NFPA70A ensures safe operation in air-handling plenums and other regulated recording spaces.
Key Features
- Extra-thick 16 gauge metal construction for durability and vibration control
- 12 mm (½ inch) thick MDF lining to eliminate resonances and extend bass response
- External volume: 1.0 cubic foot nominal
- Internal volume: 0.71 cubic foot
- Outside diameter: 380 mm (15.0 inches)
- Inside diameter: 273 mm (10.7 inches)
- Height: 259 mm (10.2 inches) above ceiling / 268 mm (10.6 inches) total height
- Ceiling cutout size: 310 mm (12.2 inches)
- Five knockout locations: 22.1 mm (0.87 inch) diameter openings for flexible wiring
- Net weight: 5.2 kg (11.5 lbs) / Shipping weight: 7.9 kg (16.5 lbs)
- U.L.-2043, U.L.-1480, NFPA90, and NFPA70A certified for air handling spaces
- Designed specifically for JBL 8-inch Control 300 series drivers
The MTC-300BB8 delivers the rigorous engineering and acoustic standards required for professional studio installations where consistent monitoring and code adherence are non-negotiable.
More Information
| Condition | New |
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At a Glance
The JBL MTC-300BB8 is a professional-grade enclosure designed to optimize the acoustic characteristics of JBL's 8-inch Control 300 drivers in fixed installation settings. Its precisely engineered internal volume of 0.71 cubic feet combined with resonance-eliminating MDF lining ensures extended, controlled bass response that integrates cleanly into background music and paging systems without acoustic compromises. Use this backbox when you need repeatable, neutral in-ceiling performance in institutional recording or monitoring applications where code compliance and consistent sound quality across multiple installations matter.
Who This Is For
Great for
- ✓ commercial installation
- ✓ institutional audio
- ✓ suspended ceiling deployment
- ✓ plenums and air-handling spaces
Not the best pick for
- – portable live sound
- – residential consumer audio
Skill level: Professional
Frequently Asked Questions
What is the MTC-300BB8 designed to work with?
This backbox is engineered specifically for JBL's 8-inch Control 300 series drivers. It is not compatible with other speaker sizes or driver types.
Will this fit in a standard drop ceiling, and what cutout size do I need?
Yes, the MTC-300BB8 is designed to mount flush with suspended ceiling grids. The required ceiling cutout is 310 mm (12.2 inches) in diameter, which integrates seamlessly into standard drop-ceiling systems.
Is this backbox approved for use in plenums and air-handling spaces?
Yes, the MTC-300BB8 carries full U.L.-2043, U.L.-1480, NFPA90, and NFPA70A certification, making it safe for installation in plenums and other regulated air-handling environments.
How does the 12 mm MDF lining help performance?
The MDF lining eliminates internal resonances and extends the driver's bass response, ensuring neutral, controlled low-end that does not color the audio in ceiling installations.
What are the cable routing options?
The backbox includes five knockout locations (one on top, four on sides) with 22.1 mm diameter openings to accommodate flexible wiring configurations for different installation scenarios.
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