JL Audio C3-650 6-3/4" 2-Way Convertible Component/Coaxial Speakers System Evolution C3 Series 6-1/2" Evolution Series 2-Way Convertible Component Speaker System Peak: 300 watts per set / 150 watts each side Frequency Response: 48-25,000 Hz  3 dB Sensitivity: 93 dB Impedance: 4 ohm