Quad 8 Inch Subwoofer Boxes

Four eights is how you get cone area without depth. It is a little less cone area than two twelves, in cabinets shallow enough to sit behind a seat that a bigger driver would not clear.

Every cabinet on this page is sealed and holds four 8 inch drivers, each in its own chamber behind a bonded full-height divider. The driver-matched cabinets are cut from the parameters the driver's maker publishes, and the universal cabinets take any set that clears their cutout and mounting depth. Each listing states the net volume for the whole cabinet and the figure per chamber, which is what one driver actually works into.