Alpine SWS-12D4 12" Dual-Voice-Coil 4-Ohm Subwoofer SWS12D4
Peak: 1000 watts, RMS: 500 watts, Impedance: Dual 4 ohms, Dual Voice Coil, High Amplitude Multi-roll Santoprene® Surround, Pulp/Kevlar Cone, Progressive Conex spider, High strength steel frame