JBL MTC-300BB12 Backbox For 12" Control 300 Series Drivers
Share
- Brand new in original box
- Full JBL manufacturer's warranty
- Free shipping in the continental US
In stock
- SKU
- MTC-300BB12
Description
JBL MTC-300BB12 Backbox For 12" Control 300 Series Drivers
The MTC-300BB12 is a purpose-built enclosure designed to unlock the full acoustic potential of JBL's 12-inch Control 300 series in-ceiling drivers in studio monitoring and production environments. This backbox eliminates the acoustic compromises of mounting directly into drywall cavities, delivering controlled bass response and consistent directivity that translates reliably across your monitoring chain and mixing decisions. Built to professional specification, it handles both passive and powered 70V/100V distributed audio systems, making it ideal for multi-room studio facilities and networked monitoring setups.
Construction & Acoustic Design
Heavy-duty 16 gauge metal construction paired with 12 mm MDF lining effectively damps cabinet resonances and extends bass response without bloat. This rigid enclosure isolates the driver from structural vibration and room modes, ensuring predictable acoustic behavior that remains stable during critical mixing and mastering sessions, regardless of ceiling construction or room acoustics.
Installation & Compatibility
The dual mounting system accommodates standard baffle attachment, while an integrated platform supports optional high-power 70V/100V transformers—eliminating the need for external mounting hardware. Strategically positioned five knockouts (22.1 mm diameter) on top and side panels provide flexible routing for speaker wire, conduit, and system connections without compromising structural integrity, streamlining your studio wiring and signal flow.
Key Features
- 16 gauge heavy-duty metal construction for rigidity and durability
- 12 mm MDF lining eliminates resonances and enhances bass response
- External volume: 3 cubic feet; Internal volume: 2.4 cubic feet
- Dimensions: 587 mm (23.1") wide × 461 mm (18.2") deep × 308 mm (12.1") mounting height
- Total height including tabs: 324 mm (12.6")
- Depth with side tabs: 505 mm (19.9")
- Dual mounting system for baffle compatibility
- Integrated mounting platform for optional 70V/100V transformer
- Five 22.1 mm (0.87") knockouts—one on top panel, one on each side and end panel
- Shipping weight: 23.1 kg (51 lbs)
The MTC-300BB12 establishes the acoustic foundation necessary for accurate monitoring, transparent mix translation, and professional-grade sound production in studio installations and networked recording facilities.
More Information
| Condition | New |
|---|---|
| Country of Manufacture | China |
Reviews
At a Glance
The JBL MTC-300BB12 is a purpose-built backbox that transforms 12-inch Control 300 drivers into a professional recording and monitoring tool for studio installations and permanent monitoring setups. Its rigid construction and acoustic damping ensure extended bass response without resonance coloration, making it ideal for capturing consistent, clear recordings in distributed or multi-room monitoring scenarios. The integrated transformer platform and flexible wire routing simplify system integration while maintaining acoustic integrity.
Who This Is For
Great for
- ✓ speech clarity
- ✓ distributed audio systems
- ✓ permanent installations
- ✓ background music
Not the best pick for
- – portable live sound
- – high-SPL concert reinforcement
Skill level: Professional
Frequently Asked Questions
What is a backbox and why do I need one?
A backbox is a professional enclosure that isolates the driver from drywall cavities and structural vibration, eliminating acoustic compromises and room-mode interference. It delivers controlled bass response, consistent directivity, and predictable acoustic behavior across different installation environments.
What ceiling drivers does this backbox fit?
The MTC-300BB12 is designed specifically for JBL's 12-inch Control 300 series in-ceiling drivers. It features a dual mounting system for standard baffle attachment and an integrated platform to support optional 70V/100V transformers.
Can this backbox handle 70V/100V distributed audio systems?
Yes, the MTC-300BB12 is built for both passive and powered 70V/100V distributed audio systems. Its integrated mounting platform eliminates the need for external transformer hardware, and five strategically positioned knockouts provide flexible routing for speaker wire and conduit.
Is this suitable for speech clarity and background music applications?
Yes, the controlled bass response and consistent directivity make it ideal for speech clarity, background music distribution, and permanent installed sound systems. The 12 mm MDF lining dampens cabinet resonances for clean, predictable audio across varied ceiling and architectural conditions.
What are the dimensions and installation considerations?
The backbox measures 587 mm (23.1") wide × 461 mm (18.2") deep × 308 mm (12.1") mounting height, with total height including tabs at 324 mm (12.6") and depth with side tabs at 505 mm (19.9"). It weighs 23.1 kg (51 lbs) and features five 22.1 mm knockouts on top, side, and end panels for flexible wire routing.
Compare With
Similar Gear
Complete the Rig
Gear that pairs well with this.
✨ For You
Based on what you've been looking at.