Kicker 10cvx10-4 Ohm Round 10-Inch Subwoofer KICKER's most powerful and advanced round woofer Best-sounding, deepest bass from a round woofer 2- or 4-Ohm dual voice coil One-piece, ultra-rigid SoloKon cone with 360-degree back bracing T-cut top plate for wider magnetic field and better sounding bass