Jbl Professional MTC-300BB12 12 Inch Speaker Back Box

Product Description

The JBL PROFESSIONAL MTC-300BB12 is a 12-inch back box enclosure designed for use with compatible JBL ceiling speaker installations. Back boxes provide a sealed rear cavity behind flush-mount ceiling speakers, improving low-frequency response and acoustic isolation from above-ceiling plenum space. This enclosure is a fabricated enclosure accessory typically installed by commercial audio or low-voltage contractors as part of a complete ceiling speaker assembly. Proper use of a back box helps meet plenum and fire-code requirements while also contributing to consistent speaker performance across the installation.

The MTC-300BB12 is suited for commercial and light commercial audio installations where ceiling speakers require rear enclosures. Typical applications include offices, retail spaces, hospitality environments, and houses of worship where distributed audio systems are deployed. It is sized to pair with 12-inch ceiling speaker drivers and mounting assemblies in the JBL MTC-300 series product family as referenced in the supplier documentation.

Key Features

• Designed for 12-inch ceiling speaker back-box applications
• Provides sealed rear enclosure cavity to improve low-frequency performance
• Supports plenum and above-ceiling installation requirements
• Sold individually as a single unit accessory
• Compatible with JBL MTC-300 series ceiling speaker mounting systems

Compatibility

Referenced in supplier data as part of the JBL MTC-300 series accessory line. Consult the product manual and JBL speaker specifications to confirm fitment with your specific ceiling speaker model before installation.

Installation Notes

Installation is typically performed by a licensed low-voltage or commercial audio contractor. Power to the audio system and any associated amplifiers should be shut off before beginning ceiling work. Verify local building and fire codes regarding plenum-rated enclosures and above-ceiling installations prior to mounting. Do not modify the enclosure structure, as alterations may affect acoustic performance or code compliance.