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JBL's MTC-300BB8 One-Cubic-Foot Backbox features extra-thick 16-gauge metal construction and a thick resonance-eliminating lining that also provides extra bass response. Made for the Control 328C and 328CT 8" Drivers, this backbox has knockouts on the sides and top panel.
This backbox has a five-year warranty from JBL Professional.
Strong and durable, this backbox is made of 16-gauge metal.
With a half-inch of medium-density fiberboard lining, this backbox is constructed to eliminate extra resonance and increase bass response.