Qpower Dual 12" Hole Vented 1" Mdf

Dual 12&quote; Slot-Ported Heavy Duty Empty Woofer Box 1&quote; MDF FACE AND 3/4&quote; MDF BODY Gold Tipped Spring Loaded Terminals| Premium Charcoal Colored Carpet (W x H x D) 30? X 12-3/4? X 16? center slot port (W x H): 3&quote; x 12&quote; Tuning Frequency: 39 HZ SLOT PORTS At BACK OF EACH CHAMBER JOIN IN A COMMON CENTER PORT 11&quote; mounting depth Volume (Sub): 1.60 cu. ft. per chamber Mounting Depth: 11-1/2”