Kicker 41KSC4104 4x10" 2-Way Coaxial Speaker - Pair (Black) Pair of Kicker 41KSC4104 KS-Series 2-Way Car Speaker Power Handling Per Speaker: 150 Watts Peak/75 Watts RMS Per Speaker Impedance: 4-Ohms Mounting Hole Diameter [in, mm]: 3-7/8x9-3/8, 99x238 Frequency Response [Hz]: 45-20k