Kicker 8″ 600 Watt DVC 4-Ohm Car Audio Subwoofer, Bass Knob with Wire
IMPEDANCE [Ohms]: 4 DVC. It features a stiff injection-molded SoloKon cone, ribbed Santoprene surround, and Forced-Air Cooling to keep the motor 25% cooler for higher reliability. This unit is designed for sealed or ported boxes.