Description:KICKER’s elite KS-Series Coaxial Speakers upgrade your audio to new levels of accuracy with extended frequency response and the smoothest highs.Potent PerformanceKICKER 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 3-inch mounting depth and just three millimeters of tweeter protrusion, the KSC690 is a perfect fit in almost every vehicle on the road today. They work best with 15 to 150 watts of recommended power.WHAT MAKES IT SUPERIOR? KICKER Preferred Upgrade over Factory Sound – NEW and IMPROVED! Adapters Included on Some Models to Fit Most All Vehicles Superior Bass Response and Accurate Musical Reproduction Features: High power handling Silk-dome tweeters for a smooth sound Polypropylene woofer and tough rubber surrounds Thin-mount design easily fits behind factory grilles Grilles included Specifications: Speaker Design: 2-Way Woofer [in, mm]: 6 x 9, 160 x 230 Tweeter [in, mm]: 1, 25 Rated Impedance [Ω]: 4 Recommended Amplifier Power [Watts RMS]: 15-150 Sensitivity [1W, 1m]: 92 Frequency Response [Hz]: 30-21k Mounting Hole Diameter [in, mm]: 5-11/16 x 8-7/16, 144 x 215 Top Mount Depth [in, mm]: 2-15/16, 75 Bottom Mount Depth [in,mm]: 3-3/16, 81 Tweeter Protrusion [in,mm]: 1/16, 1 Grilles: Yes Tweeter Magnet Material: Neodymium Tweeter Dome Material: Silk Woofer Cone Material: Polypropylene Woofer Surround Material: Rubber