MTC-300BB8-B vs MTC-SG6-8 — Compare
JBL MTC-300BB8 Backbox For 8" Control 300 Series Drivers B-Stock vs JBL MTC-SG6/8 Square Grille For Control 200 & 300 Series
The MTC-300BB8 is an acoustic enclosure that forms the foundation of an in-ceiling speaker system, while the MTC-SG6/8 is a protective grille that covers the speaker driver itself. Choose the backbox if you are building a complete ceiling-mounted installation; choose the grille if you already have speakers installed and need a protective or aesthetic cover.
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JBL MTC-300BB8 Backbox For 8" Control 300 Series Drivers B-Stock
JBL MTC-SG6/8 Square Grille For Control 200 & 300 Series
Specs side by side
| JBL MTC-300BB8 Backbox For 8" Control 300 Series Drivers B-Stock | JBL MTC-SG6/8 Square Grille For Control 200 & 300 Series | |
|---|---|---|
| Price | $136.24 | $133.98 |
| Brand | JBL | JBL |
| Condition | Refurbished | New |
Why choose JBL MTC-300BB8 Backbox For 8" Control 300 Series Drivers B-Stock
- ✓ Engineered enclosure volume (0.71 cu ft) optimized for 8-inch drivers with extended bass response
- ✓ Thick construction (16 gauge metal, 12 mm MDF) eliminates resonances and vibration
- ✓ U.L. and NFPA certified for plenum and air-handling spaces in regulated commercial environments
- ✓ Multiple cable knockouts simplify professional integration
Why choose JBL MTC-SG6/8 Square Grille For Control 200 & 300 Series
- ✓ Direct-fit protective grille for Control 200 and 300 Series speakers
- ✓ Durable zinc-plated steel with powder-coat finish resists corrosion in hospitality and retail environments
- ✓ Includes five replacement M4 screws for maintenance and repairs
- ✓ Clean, professional 340×340 mm square format integrates seamlessly with installed systems
Frequently asked questions
Can I use these products together?
Yes. The MTC-300BB8 backbox mounts behind the ceiling cavity to support the driver, while the MTC-SG6/8 grille mounts on the front of the speaker baffle for protection and aesthetics. Both are part of a complete in-ceiling system.
Which one do I need if I'm starting from scratch?
You need the MTC-300BB8 backbox as the primary acoustic component, paired with a compatible 8-inch Control 300 driver. The MTC-SG6/8 grille is optional but recommended for protection and a finished appearance.
Is the grille suitable for wet or humid environments?
The MTC-SG6/8 grille is zinc-plated with a powder-coated finish designed for corrosion resistance in demanding hospitality, retail, and office installations. However, it is not rated for extreme moisture or outdoor use; consult specifications for specific environmental requirements.
Does the backbox require professional installation?
The MTC-300BB8 is designed for professional integrators familiar with suspended ceiling systems and electrical codes. Its U.L. and NFPA certifications require proper installation in compliant spaces; improper mounting may void certification and create safety hazards.