These 6" x 8" 2-way REV Series speakers feature Aramid fiber composite cone woofers for exceptional sound quality, wave guides for optimal sound dispersion, 1-1/8" soft dome tweeters, and hot yellow cones. The TS-D680Rs are custom-built for Ford and Mazda vehicles, handle 250 watts maximum music power, and deliver a frequency response of 30Hz - 32kHz. A butyl rubber surround improves bass response, and a high-energy strontium woofer magnet increases power handling. For convenience, the TS-D680R's include a built-in crossover network.