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JBL - MTC-300BB12 - BACKBOX FOR 12
JBL - MTC-300BB12 - BACKBOX FOR 12
JBL - MTC-300BB12 - BACKBOX FOR 12
JBL - MTC-300BB12 - BACKBOX FOR 12
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JBL - MTC-300BB12 - BACKBOX FOR 12" CONTROL 300 SERIES DRIVERS

Marsoni M251S
Sale price$213.50
Pay 4 payments of $53.38 a month.Shop Pay
Get it in 3 business days with 1 day shipping. Friday, May 29
JBL - MTC-300BB12 - BACKBOX FOR 12" CONTROL 300 SERIES DRIVERSMTC 300BB12 3 Cubic Foot Rectangular Backbox for Control 300 Series 12" Drivers, Fits Control 321C, 321CT, 322C, 322CTCT & 312CS, Extra thick 16 gauge Metal Construction, Lined with 0. 5" (12mm) thick MDF to eliminate resonances and to provide extra bass response, Dual mounting system for baffle, Mounting studs for MTC 300T150 70V 100V transformer, 12. 6" (324mm) Height x 23. 1" (587mm) Width x 19. 9" (505mm) Deep, UL Listed, Mounting Screws included
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
4.5 ★★★★★
Based on 1796 reviews
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Product Reviews
T
Verified Purchase
Tony T
Battle Creek, US
★★★★★ 3
Decent, but....
Item Package Quantity: 6, Color: Green
These magnets were decent, but not as strong as I hoped. They are good enough to hold a shovel or helmet, but anything over 10+ pounds did not work.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 16, 2025
D
Verified Purchase
Don Elkins
Birmingham, US
★★★★★ 4
Good to average purchase but they work.
Item Package Quantity: 10, Color: Green
Magnetic hooks are well made, the hooks have plenty of strength. The magnets on the hooks aren’t quite as stout as they should be, but all in all they were a good buy.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 26, 2025
T
Verified Purchase
Tri 12
Bozeman, US
★★★★★ 5
Great holding capacity for hand tools
Item Package Quantity: 6, Color: Orange
I needed to add space to my workshops metal shelves and these are perfect for hanging hand tools around the metal bracing. They have enough holding capacity to hang a small sledgehammer. Now I can readily locate tools and allow for more space on the shelves.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 26, 2026
A
Verified Purchase
Amazon Customer
Port Orchard, US
★★★★★ 5
Shelves
Size: 12 Inch, Color: Black
High quality, strong and beautiful. I receive alot of compliments
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 3, 2026
L
Verified Purchase
Lily🐝
Cuba, US
★★★★★ 5
Fabulous! I’ve purchased these more than once!
Size: 12 Inch, Color: Gold, Size: 12 Inch, Color: Gold
These are beautiful and the perfect size for the 12” wide boards I use. The lumber isn’t cut to exactly 12” so there is a slight gap in the back towards the wall which I like for cords, and the boards stay in place with bottom screws. These are very sturdy, thick, and solid. I have not had a single problem with any of them. They are easy to install and very functional. Definitely worth the cost. I have purchased a couple of times.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 28, 2024

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