Rockford Fosgate 8 inch p2d2 subwoofer dual 2ohm voice coil 250 watt rms, fitted in downward firing custom made 18mm mdf box to fit under front passenger seats in Ford transit custom , you do have to remove lower bulk head to slide subwoofer under the seats. Used for a few months but in perfect working order barely run in. Packs a punch for an 8 inch sub sounds more like a 10 inch and adds some much needed bass to the transit sound system. Dimensions 19 inches wide by 12 inches high by 8 3/4 inches deep. Box has gold plated terminals and acoustic wadding inside and has an internal volume of 0.8 cubic feet.
eBay