CS Series CSC68CS-Series 6x8-inch Coaxial Speakers are the perfect way to upgrade your factory system. A stamped-steel frame 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 75 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 frequenciesSpecificationsSpeaker Design2 - way - Woofer Size | in [mm]6x8 [160x200]Tweeter Size | in [mm]1/2 [13]DC Resistance | ohm3.5Peak Power (watts, per ANSI/CTA-2031-A)225Recommended Amplifier Power (watts RMS)75Sensitivity [SPLo] | d - B @ 1W, 1m90Effective Frequency Range | Hz45-20k - Mounting Hole Diameter | in [mm]5 x 7 3/16 [126x182]Top Mount Depth | in [mm]3/8 [9]Bottom Mount Depth | in [mm]2 3/16 [56]Tweeter Protrusion | in [mm]0GrillesNoTweeter Magnet MaterialNeodymiumTweeter Dome Materia - PEI [polyether imide - Tweeter Design - Balanced dome - Woofer Cone MaterialPolypropyleneWoofer Surround Material - Polyester foam