CS-Series 4-inch Coaxial Speakers deliver accuracy, durability and a factory fit. These coaxial speakers are a significant upgrade in your sound. A stamped-steel framework supports a rigid polypropylene cone with EVC (Extended Voice Coil) technology for the best sonic quality. Using zero-protrusion PEI tweeters ensures you get every bit of clarity you need, without interfering with factory grilles. These CS speakers work best with 50 watts of continuous power. 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