The DS 6-1/2-Inch Coaxial Speakers are the ideal upgrade for your car doors. Using zero protrusion PEI tweeters ensures you get every bit of clarity you need, without interfering with factory grilles. A stamped steel framework supports a ribbed, UV-treated foam surround and rigid polypropylene cone with EVC? (Extended Voice Coil) technology, for the best sonic quality. These DS speakers work best with 60 watts of recommended power.