JBL 1 Cubic Foot Rear Box for 8" Control 300 Series Ceiling Speakers Model MTC-300BB8

Back box JBL Control 300 Series 1 Cubic Foot Capacity 8-inch Ceiling Speakers Model MTC-300BB8

• The JBL MTC-300BB8 back cover is designed to be the ideal professional back cover for the 8-inch Control 300 Series speakers, combining strength, durability, and professional sound isolation.
• It features a high-quality, thick metal design with a 12mm thick MDF wood interior lining that reduces vibrations and noticeably improves bass performance.
• The rear enclosure provides balanced acoustic performance with effective protection for the internal speaker components, making it an ideal choice for professional installations in halls, mosques, and commercial buildings.
• It is manufactured to UL and NFPA standards to be safe for use in enclosed ceilings (Plenum Rated), making it suitable for high-end architectural acoustic installations.

Technical description:

• The MTC-300BB8 back cover features a robust 16-gauge metal construction to provide excellent support for the speaker, while the MDF wood interior lining ensures the absorption of unwanted frequencies and improved low-end sound performance.
• The box includes multiple Knockouts on the top and sides to facilitate wire extension and cable installation in a safe and quick manner.
• Thanks to its compact circular design, it can be easily installed in standard ceilings using the dedicated openings for Control 328C and Control 227C speakers.

Technical specifications:

• Type: Professional metal closed back can
• Usage: Control 300 Series 8-inch headphones
• External dimensions: 1 cubic foot (nominal)
• Actual internal volume: 0.71 cubic feet
• Material: 16GB thick metal with a 12mm thick MDF wood lining.
• Knockouts:
• Hole diameter: 22.1 mm (0.87 inches)
• Locations: 5 slots (one at the top + four on the sides)
• Height above the ceiling: 259 mm (10.2 inches)
• Total height: 268 mm (10.6 inches)
• Outer diameter: 380 mm (15 inches)
• Inner diameter: 273 mm (10.7 inches)
• Required sunroof opening: 310 mm (12.2 inches)
• Net weight: 5.2 kg (11.5 lbs)
• Weight when shipped: 7.9 kg (16.5 lbs)
• Certifications: UL-1480 / UL-2043 / NFPA90A / NFPA70A
• Indoor use in ceilings: Yes

Key features:

• Extremely strong metal structure with a thickness of 16 Gb to ensure robust support and corrosion resistance.
• An MDF inner lining enhances acoustic performance and reduces resonance and vibrations.
• Improved bass response through the isolating cylindrical design.
• Flexible mounting system with multiple Knockouts for easy wire extension.
• Compliant with international safety standards (UL/NFPA) for use in enclosed ceilings.
• Fully compatible with JBL Control 328C and 227C headphones.
• Scratch-resistant coating with a long-lasting, elegant finish.

Product summary:

• The JBL MTC-300BB8 rear enclosure is the ideal rear enclosure for mounting 8-inch ceiling speakers in professional environments.
• It provides an ideal balance between mechanical robustness and enhanced acoustic performance, making it essential in projects that require high sound quality and sophisticated engineering integration.
• Thanks to its robust metal construction and insulating lining, it contributes to improving bass sound and greatly reducing distortion.

Additional features:

• A design that is fully compatible with Control 300 Series headphones (such as 328C/227C).
• Easy installation with support for standard mounting systems in suspended ceilings.
• Rust and moisture resistant coating for long-term use in indoor environments.
• The multi-directional Knockouts system allows for flexibility in connecting cables from any direction.
• Full support for JBL accessories such as MTC-SG6/8 and MTC-RG6/8 front-end networks.

Applications used for the product:

• Mosques and places of worship.
• Shopping centers and large malls.
• Sound halls and conference rooms.
• Universities and educational institutions.
• Modern hotels and administrative buildings.
• Government facilities and public utilities.

Summary and final advice:

• If you want to improve the performance of your 8-inch JBL ceiling speakers and provide high-quality acoustic and mechanical protection, then a back cover is the way to go . The MTC-300BB8 is the perfect choice.
• This enclosure provides a significant improvement in bass sound, reduced vibrations, and ease of installation, making it essential for any professional audio project that relies on JBL Control 300 series headphones.

Detailed product data (Data Sheet).