Fox Acoustics 2021+ BRONCO 2-12" VENTED SUB BOX2021+ FORD BRONCO 4 DOOR ONLY DUAL 12" VENTED SUB BOX Does not fit Bronco sport. Fits both hard and soft top. AIR VOLUME: 4. 5 NET TUNE FREQ: 35 HZ SUB HOLE SIZE: 11. 15" MAX MOUNTING DEPTH: 11. 5" This sub box spans across the cargo area of the Bronco, leaving the floor unobstructed. Clearance under the sub box is approximately 12" Unlike outward firing enclosures, this downward firing design turns the cargo area into a large bass chamber which