PIONEER TSW254C 10-Inch Subwoofer for Car Stereo 10 Foamed IMPP (Injection Molded Polypropylene) Rigilite Composite Cone Woofer Dual-Layer Urethane Surround Direct Bobbin Mounted VCCS (Voice Coil Cooling System) Conex Damper with Damper Ring Lead Wires Integrated into Damper for High Reliability and Improved Power Transfer