JBL MTC-300BB12 3 Cubic Foot Rectangular BackboxThe JBL MTC 300BB12 is a purpose built acoustic enclosure for Control 300 series in wall and surface mount speakers. Designed for integration into commercial and institutional audio systems, this backbox eliminates cavity resonance and extends bass performance through optimized internal volume and damping materials, making it essential for cinema, houses of worship, retail, and hospitality installations where consistent bass clarity is required.
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