JL Audio VR690-CXi Evolution VR Series 6 x 9 inch (150x230mm) 2-Way Coaxial Car Speakers (Priced per Pair) Continuous Power Handling: 80 Watts Rec. Power Range (per channel): 25 - 150 Watts System Efficiency: 89.0 dB @ 1W/1m System Nominal Impedance: 4 ohms System Frequency Response: 53 Hz - 22 KHz  3 dB