Kicker DSC6930 6x9-Inch (160x230mm) 3-Way Speakers, 4-Ohm bundleDS Series 6x9" 3-Way The DS 6x9-Inch Triaxial (3-Way) Speakers are a great way to upgrade the sound in your car. 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. Add a DX amplifier to increase the level and quality of the volume in your ride. These DS speakers work best with 90 watts of recommended power. See below for more details. Specifications WOOFERS [in, mm]: 6x9, 160x230 MIDRANGES [in, mm]: 2, 50 TWEETERS [in, mm]: 1/2, 13 IMPEDANCE [Ohms]: 4 MAX REC. AMP POWER [watts peak]: 140 MAX REC. AMP POWER [watts RMS]: 6-70 SENSITIVITY [dB 1w/1m]: 92 FREQ. RESPONSE [Hz]: 30-20k MOUNTING DEPTH [in,mm]: 3-1/4, 8.3 MOUNTING DIAMETER [in, mm]: 5-5/8 x 8-7/16, 151 x2 22 GRILLES: yes