Kicker 51KSC404 4" 2-way coaxial speakers

KICKER’s elite KS-Series Coaxial Speakers upgrade your audio to new levels of accuracy with extended frequency response and the smoothest highs. Highlights: Speaker Design  2-way Woofer 4 in, 100mm Tweeter 1/2 in, 13 mm Rated Impedance 4 Ω Recommended Amplifier Power  15-75 Watts Sensitivity 88 (1W, 1m) Frequency Response 60-20k Hz Mounting Hole Diameter 3-11/16 in, 94 mm Top Mount Depth 1-13/16 in, 46 mm Bottom Mount Depth 2-1/16 in, 51 mm Tweeter Protrusion 0 in, 1mm Grilles No Features: Potent Performance 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. See below for more details. High power handling Silk-dome tweeters for a smooth sound Polypropylene woofer and tough rubber surrounds Thin-mount design easily fits behind factory grilles