The Kicker KS-Series 47KSC404 Coaxial Speakers upgrade your audio to new levels of accuracy with extended frequency response and the smoothest highs. Kicker KS-Series Speakers let you play at concert-like volume, yet maintain the smoothness and subtlety to please even the most selective ear. Internally dampened polypropylene cones and durable rubber surrounds assist the woofers in creating precise midrange and midbass, while high-quality silk-dome tweeters deliver natural, detailed highs. With less than a 2-inch mounting depth and zero tweeter protrusion, the KSC40 is a perfect fit in almost every vehicle on the road today. They work best with 15 to 75 watts of recommended power.