JL Audio 13.5" TW5v2 Thin Subwoofer Driver - 13TW5V24

4 Ohm Nominal Impedance/ Patented Thin-Line Woofer Technology/ Cast Alloy Chassis Has Also Been Modified For Greater Strength And The Redesigned Motor Now Features An Annular Vent/ Optimized For Enclosures That Are Far Smaller Than Most 12-Inch Woofers Require/ High-Quality Sub-Bass/ Black Finish