These FOUR KICKER DS65 6.5" 400 Watt 4-Ohm 2-Way DS Series Car Audio Speakers are an easy-to-install, drop-in factory upgrade with the flexibility to fit into any vehicle"s doors. These speakers provide the clear middle frequencies and precise highs that ultimately define a great-sounding audio system. The woofers use a heavy-duty motor structure and Extended Voice Coil (EVCTM) technology not found in factory-provided speakers, creating remarkable performance and ultra-clean bass. They also bear polypropylene cones with ribbed, UV-treated surrounds for precise linear excursion and optimum sound. The half-inch, balanced-dome, polyetherimide tweeters supply outstanding definition.