CS Series CSC65CS-Series 6-1/2-inch Coaxial Speakers are the perfect way to upgrade your factory speakers. The stamped-steel framework supports a rigid polypropylene cone with EVC (Extended Voice Coil) technology for the best sonic quality. Using zero-protrusion PEI tweeters with neodymium magnets, you get the clarity you need without interfering with factory grilles. - These CS speakers work best with 100 watts of recommended power. See below for more details. - Fits nearly every car made - Zero-protrusion tweeters to fit nearly any factory depth - Woofer EVC (Extended Voice Coil) tech assists with precise linear excursion - UV-treated poly-foam surround resists heat or direct sunlight - Large woofer magnet in a heavy-duty motor for ultra-clean bass - PEI-tweeter construction provides superb clarity - Neodymium tweeter magnets allow for increased volume in high frequencies - Steel mesh grilles included for speaker protectionSpecificationsSpeaker Design2 - way - Woofer Size | in [mm]6 1/2 [160]Tweeter Size | in [mm]1/2 [13]DC Resistance | ohm3.3Peak Power (watts, per ANSI/CTA-2031-A)300Recommended Amplifier Power (watts RMS)100Sensitivity [SPLo] | d - B @ 1W, 1m90Effective Frequency Range | Hz40-20k - Mounting Hole Diameter | in [mm]4 13/16 [123]Top Mount Depth | in [mm]3/8 [9]Bottom Mount Depth | in [mm]1 11/16 [43]Tweeter Protrusion | in [mm]0GrillesYesTweeter Magnet MaterialNeodymiumTweeter Dome Materia - PEI [polyether imide - Tweeter Design - Balanced dome - Woofer Cone MaterialPolypropyleneWoofer Surround Material - Polyester foam