Power Acoustik EF-653 Edge Series 400 Watt 6.5x2033; 3-Way Coaxial Speakers Improved Efficiency Diaphragm & Magnet Structure Carbon Fiber Injection Molded Polypropylene Cone Treated Woven Cloth Surround 1 Voice Coil on Aluminum Former, 1 Balanced Dome Mylar Tweeter 4-ohm System Impedance