JL Audio M650-CCX-SG-WH 6.5-inch (165 mm) Cockpit Coaxial Speaker System, White Sport Grilles Continuous Power Handling (RMS): 75 W Peak Music Power: 225 W System Efficiency: 89.5 dB @ 1 W / 1 m System Nominal Impedance: 4 ohms System Frequency Response: 55 Hz - 25 KHz  3 dB