CS-Series 5-1/4-Inch Coaxial Speakers are an excellent upgrade from factory speakers. A significant upgrade from your factory sound, 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 75 watts of continuous power.