Kicker DSC650 6.5-Inch (160-165mm) Coaxial Speakers, 4-Ohm bundleDS Series 6.5" Coax 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. See below for more details. Specifications WOOFERS [in, mm]: 6-1/2, 160 MIDRANGES [in, mm]: N/A TWEETERS [in, mm]: 1/2, 13 IMPEDANCE [Ohms]: 4 MAX REC. AMP POWER [watts peak]: 100 MAX REC. AMP POWER [watts RMS]: 6-50 SENSITIVITY [dB 1w/1m]: 90 FREQ. RESPONSE [Hz]: 40-20k MOUNTING DEPTH [in,mm]: 1-13/16, 4.6 MOUNTING DIAMETER [in, mm]: 4-13/16, 123 GRILLES: yes