JBL MTC-300BB12 Rectangular Backbox for Control 300 Series 12" Ceiling Speakers, 3 Cubic Foot Enclosure, Fits Control 312CS, 321C/CT, and 322C/CT, Includes Mounting Hardware, (MTC-300BB12)

JBL MTC-300BB12 Rectangular Backbox for Control 300 Series 12" Ceiling Speakers (MTC-300BB12)

The JBL MTC-300BB12 is a heavy-duty rectangular backbox enclosure specifically designed for JBL Control 300 Series 12-inch ceiling loudspeakers and subwoofers. Engineered to provide the proper acoustic volume, structural support, and installation flexibility, the MTC-300BB12 is an essential accessory for achieving optimal performance from compatible JBL ceiling speaker systems.

Designed for use with the JBL Control 312CS, Control 321C, Control 321CT, Control 322C, and Control 322CT, this enclosure provides the recommended internal acoustic volume necessary to maximize low-frequency response, efficiency, and overall sound quality. By creating a controlled acoustic environment behind the loudspeaker, the backbox helps ensure consistent and predictable system performance.

The MTC-300BB12 features a generous 3 cubic foot internal enclosure volume, optimized for high-output 12-inch ceiling loudspeakers and subwoofers. This large enclosure capacity supports extended low-frequency performance and improved bass response, making it ideal for premium commercial audio installations.

Constructed from durable steel, the enclosure is designed to withstand the demands of professional installation environments while providing long-term structural integrity. Its rigid construction helps minimize unwanted vibrations and resonances, contributing to cleaner and more accurate sound reproduction.

The rectangular enclosure format is engineered to integrate seamlessly into commercial ceiling spaces while providing sufficient internal volume for high-performance loudspeaker operation. The design supports professional installation practices and accommodates the acoustic requirements of JBL’s premium Control 300 Series ceiling products.

The MTC-300BB12 includes mounting hardware, simplifying installation and ensuring secure attachment of compatible loudspeakers and subwoofers. The enclosure is designed to work with JBL Control 300 Series installation accessories, helping integrators achieve reliable and professional results.

This backbox not only enhances acoustic performance but also provides protection for the loudspeaker assembly from dust, debris, and environmental factors above the ceiling plane. It contributes to both improved sound quality and installation longevity.

Ideal for conference centers, hotels, restaurants, retail stores, corporate facilities, houses of worship, educational institutions, entertainment venues, hospitality environments, and professional AV installations, the JBL MTC-300BB12 delivers the acoustic and structural foundation required for premium JBL ceiling speaker systems.

Key Features:

• Premium rectangular backbox enclosure for JBL Control 300 Series ceiling speakers
• Compatible with Control 312CS, 321C, 321CT, 322C, and 322CT models
• Large 3 cubic foot internal enclosure volume
• Optimized for 12-inch high-performance ceiling loudspeakers and subwoofers
• Enhances low-frequency response and overall acoustic performance
• Heavy-duty steel construction for long-term durability
• Helps reduce vibration and enclosure resonance
• Provides controlled acoustic loading for predictable system performance
• Protects loudspeaker components from dust and debris above the ceiling
• Includes mounting hardware for installation
• Supports professional commercial and architectural audio installations
• Designed for use with JBL Control 300 Series accessories
• Ideal for distributed audio, foreground music, and sound reinforcement systems
• Suitable for hospitality, retail, education, corporate, entertainment, and worship applications
• Provides a secure and acoustically optimized enclosure solution for JBL premium ceiling loudspeakers and subwoofers.