Infinity Kappa 62.9i 6.5" 225 Watt 2-Way Speakers The Kappa 62.9i 6-1/2-Inch speakers feature light, but stiff woven glass-fiber woofer cones that won't flex or distort. Plus One woofer cones This patent pending technology deliver a cone with more surface area than competing models of the same size. Frequency Response: 45Hz - 25kHz with Sensitivity: 95dB True Four Ohms Compensation