Alpine SXE-6926S 6x9" 2-Way Coaxial Speaker Rated RMS Power: 45 Watts Max Peak Power: 280 Watts Nominal Impedance: 4 Ohms Frequency Response: 40Hz-20kHz Grilles: Yes Woofer Diaphragm Material: Long Fiber Natural Pulp Tweeter Diaphragm Material: Mylar Foam Woofer Edge Woofer Magnetic Material: Barium Ferrite Tweeter Magnetic Material: Barium Ferrite