Sony XS-GTX6931 GTX Series 6.5" Component Speakers (Discontinued by Manufacturer) 6 x 9-inch three-way, coaxial speaker with 400 watts maximum power handling HOP woofer with rubber-coated cloth surround PEN diaphragm midrange with ferrite magnet PEI dome piezo tweeter Sensitivity: 91+/-2dB/W/m