JBL MTC-300BB8 Backbox for 8-inch C300 100713589 as you'd expect from this

as you'd expect from this high-end manufacturer

The ZonePRO 641 will take your Commercial Audio system to the next level with advanced processing

or preset recall

and more secure

JBL MTC-300BB8 Backbox for 8-inch C300 100713589 as you'd expect from thisJBL MTC 300BB8 Backbox for 8 inch C300 Professional Series 1 Cubic Ft. Backcan for Control 300 Series 8 in. Drivers Features: Extra thick 16 gauge metal construction. Lined with 12 mm (1 2 in) thick MDF to eliminate resonances and to provide extra bass response. Knockouts on top and side. Specifications: External Volume 1 cu ft., nominal Internal Volume . 71 cu ft. Knockouts 22. 1 mm (0. 87 in) diameter opening Five (5) locations: 1 on top panel 4 on