Put a little more bass in your trunk space in the enclosure box of your choice when you choose the Boss Chaos Exxtreme 10-Inch 1000-Watt DVC 4-Ohm Subwoofer.This package includes 4 subwoofers.This 10-inch sub has a mounting diameter of 9.19 inches and a mounting depth of 4.5625 inches . making it perfect for compatible sealed boxes with 0.65 cubic feet of air space and ported boxes with 1 cubic feet of air space. The subwoofer itself has a peak power output of 1 .000 watts and RMS output of 500 watts . giving you plenty of power for deep bass.This dual voice coil subwoofer also features a 4-ohm impedance . polypropylene cone and rubber surround . and 87 dB sensitivity. For those in search of better sound in their ride . this sub by Boss is a solid choice.