Kicker 08KS4100 4-Inch X 10-Inch 100mm X 250mm Coax Speaker Pair of 4x10-inch coaxial speakers Curvilinear, gray woofer cones with Santoprene surround and newly designed basket 35 Watts RMS (70 Watts peak) power handling with 4-ohm impedance 45 Hz-20kHz frequency response One-year limited warranty