JBL Pre-Mounted Ceiling Rear Box – Robust steel construction for increased sound depth and speaker stability in commercial ceilings, Model MTC-81BB8

JBL Pre-Mounted Ceiling Rear Box – Robust steel construction for increased sound depth and speaker stability in commercial ceilings, Model MTC-81BB8

• The JBL MTC-81BB8 ceiling rear box is specifically designed to provide a strong and secure support base for ceiling speaker installation in commercial and professional projects.
• This rear box improves sound quality by increasing the internal cavity volume to 7.4 liters, giving the speaker a deeper sound response at low frequencies and reducing distortion caused by ceilings or soundproofing.
• The box is designed to be compatible with the JBL 8138 speaker and the MTC-81TB8 Tile Bridge mounting base, making it an essential part of the complete suspended ceiling audio mounting system.
• The roof box features a robust steel structure and is coated with a rust-resistant black E-Coating that ensures long service life even in sensitive environments.

Technical description:

• It comes The MTC-81BB8 roof rear box features a 16-gauge (1.3 mm) thick metal frame to provide excellent protection for internal speaker components, with a design that allows for pre-installation before the roof tiles are laid.
• It has 5 Knockouts for easy wire connection, and standard 286 mm (11.25 inch) diameter mounting points to secure the speaker and tile bridge base.
• It also contains adjustable flexible mounting straps that allow the box to be easily hung in suspended or plaster ceilings while maintaining its stability during installation.

Technical specifications:

• Product type: Pre-Install Backcan
• Material: 16-gauge (1.3 mm) thick steel with rust-resistant E-coating
• Internal volume: 7.4 liters (0.26 cubic feet)
• Number of connection slots (Knockouts): 5 slots (4 side + 1 top)
• Attachment points: Two perforated metal strips with side mounting options
• Mounting points: 4 metal clip-nuts on a 286 mm mounting ring
• Dimensions (Height x Width x Depth): 178 x 300 x 300 mm (7 x 11.75 x 11.75 inches)
• Net weight: 1.1 kg (2.5 lbs)
• Shipping weight: 1.5 kg (3.2 lbs)
• Color: Black
• Compatibility: JBL 8138 Ceiling Speaker and MTC-81TB8 Tile Bridge
• Surface treatment: Corrosion and moisture resistant polymer coating
• Usage: For suspended ceilings and enclosed commercial systems

Key features:

• A robust steel design protects the internal components of the speaker from external elements.
• Increased acoustic cavity size (7.4 liters) to improve low-frequency response
• A rust-resistant coating (E-Coating) ensures durability and longevity.
• Five Knockouts for easy and flexible wire connection
• Fully compatible with JBL 8138 speakers and professional mounting systems.
• Secure and stable installation thanks to perforated side strips and metal clips
• Design compliant with international standards UL1480 and NFPA for safety in roofing systems

Product summary:

• The JBL MTC-81BB8 ceiling-mounted rear box is the perfect complement to the JBL 8138 speakers, combining structural strength with effective in-ceiling audio control.
• Thanks to its large internal volume and robust construction, the box ensures balanced acoustic performance and maintains sound clarity in various installation conditions.
• It is also easy to handle in audio infrastructure projects thanks to its smart design and ease of installation with the rest of the system components.

Additional features:

• Precision engineering design to suit professional audio systems
• Easy to store thanks to the ability to nest the pieces during transport (Nesting Design)
• An ideal option for large projects requiring the installation of multiple speakers
• Complies with international electrical and construction safety standards.
• Suitable for all types of commercial ceilings, including suspended and metal ones.

Applications used for the product:

• Sound systems in commercial offices
• upscale hotels and restaurants
• Educational and conference halls
• Hospitals and medical centers
• Waiting and Reception Lounges
• Malls and shops
• Acoustic infrastructure projects in modern buildings

Summary and final advice:

• If you are looking for a professional ceiling back box that improves sound quality and provides high protection for ceiling speakers, the JBL MTC-81BB8 ceiling back box is the perfect choice for you.
• It gives you better sound performance, ease of installation, and long-lasting durability thanks to its environmentally resistant metal design.
• An ideal choice for professional installations of sound systems that require power, stability and superior sound quality.