JBL MTC-300BB8 Backbox for Control 328C/CT Ceiling Speakers, 1 Cubic Foot Enclosure, 16-Gauge Steel Construction, Includes Mounting Hardware, (MTC-300BB8)

JBL MTC-300BB8 Backbox for Control 328C/CT Ceiling Speakers (MTC-300BB8)

The JBL MTC-300BB8 is a premium acoustic backbox enclosure specifically engineered for the JBL Control 328C and Control 328CT ceiling loudspeakers. Designed to provide the optimal acoustic environment for these high-performance ceiling speakers, the MTC-300BB8 enhances low-frequency performance, improves installation consistency, and delivers reliable structural support in professional commercial audio installations.

Featuring a 1 cubic foot internal enclosure volume, the MTC-300BB8 is acoustically optimized to match the performance requirements of the Control 328 Series loudspeakers. The enclosure helps provide controlled acoustic loading behind the speaker, resulting in improved bass response, more predictable performance, and greater consistency between installations.

Constructed from heavy-duty 16-gauge steel, the backbox offers exceptional strength and durability for long-term commercial use. Its rigid construction minimizes unwanted resonance and vibration, helping maintain accurate sound reproduction while protecting the loudspeaker assembly.

The MTC-300BB8 is designed to integrate seamlessly with JBL Control 328C and Control 328CT ceiling speakers, creating a complete installation solution that supports both acoustic performance and mechanical stability. The enclosure helps isolate the speaker from the ceiling cavity while protecting it from dust, debris, and environmental contaminants above the ceiling plane.

Its robust design makes it suitable for demanding commercial environments where premium sound quality and reliable installation practices are essential. The enclosure contributes to cleaner low-frequency performance and improved system efficiency by maintaining the recommended internal volume for the loudspeaker.

The backbox includes mounting hardware, simplifying installation and ensuring secure attachment within ceiling structures. It is suitable for both new construction and retrofit projects where controlled loudspeaker performance and professional installation quality are priorities.

Designed for use in high-end distributed audio systems, the MTC-300BB8 helps maximize the performance of JBL’s premium ceiling loudspeakers while maintaining a clean architectural appearance.

Ideal for hotels, restaurants, conference centers, retail stores, corporate offices, educational facilities, healthcare environments, houses of worship, hospitality venues, entertainment spaces, and professional AV installations, the JBL MTC-300BB8 provides the acoustic and structural foundation necessary for premium ceiling loudspeaker performance.

Key Features:

• Premium backbox enclosure for JBL ceiling loudspeakers
• Designed specifically for JBL Control 328C and Control 328CT speakers
• Optimized 1 cubic foot internal enclosure volume
• Heavy-duty 16-gauge steel construction
• Enhances bass response and overall acoustic performance
• Reduces unwanted enclosure resonance and vibration
• Provides controlled acoustic loading for consistent loudspeaker operation
• Protects loudspeaker assembly from dust and debris above the ceiling
• Supports professional commercial audio installations
• Suitable for new construction and retrofit projects
• Includes mounting hardware for secure installation
• Improves installation consistency and system reliability
• Compatible with JBL Control 300 Series ceiling loudspeaker systems
• Ideal for distributed audio, foreground music, and paging systems
• Suitable for hospitality, retail, education, healthcare, corporate, entertainment, and worship applications
• Provides a durable, acoustically optimized enclosure solution for JBL Control 328 Series ceiling speakers.