The CS-Series delivers remarkable performance and ultra-clean bass, utilizing a heavy-duty motor/magnet structure with EVC (Extended Voice Coil) for even deeper lows. ^^ By drastically reducing the mounting depth, CS-Series Coaxial and Three-Way Speakers will fit in nearly every make and model of vehicle on the road today. ^^ The perfect upgrade from your factory sound, a stamped-steel framework supports a rigid polypropylene cone and zero-protrusion PEI tweeters. ^^ UV-treated poly-foam surround resists heat or direct sunlight ^^ Neodymium tweeter magnets allow for increased volume in high frequencies