This is a MTX JH4512X2D dual 12" subwoofer enclosure with side firing slot port. This complete 1000 watt system includes two 12" MTX JackHammer JH45 series subs and an MTX specially designed dual subwoofer enclosure. These two high powered 12" subs come loaded and pre-wired (at 2-ohms) in a heavy duty enclosure. These two subs feature 1000 watts peak power (500 watts RMS),a rubber surround that's stitched directly to the polypropylene cone for extra strength, high temperature voice coils and Spider Plateau Venting technology which helps push hot air out of the voice coil and bring cool air in. Made with a high quality 3/4" MDF panels and dada/v-groove construction for a heavy duty sub box enclosure which produces higher SPL levels and deliver twice as much bass as traditional enclosures. It also features a side firing slot port, an MTX Audio gothic logo and beveled corners. So if you're looking for a solution for heavy, hard hitting bass, here it is!