Kicker 48TRTP122 Sub 12 Inch Down Firing Subwoofer Loaded Enclosure 500w RMSTRTP COMPRT 12" DOWN FIRING LOADED ENCLOSURE 2 OHM 48TRTP122 Fitting perfectly under your truck seat or in the trunk, ultra efficient TRTP Down Firing Loaded Enclosures deliver huge bass without taking up needed cargo room. They come loaded with a passive reFLEX subwoofer and CompRT active sub that provides extremely low bass. The TRTP 12 inch Subwoofer Enclosure is the easiest way to get great bass under your seat, in your cargo area or in the trunk.