KS Series 6.75" Components The KSS 6-¾ Inch Separates give you the accuracy and power handling you need to make the music come alive. Features: High Power Handling Extended Dynamic Range EVC™ (Extended Voice Coil) Technology For Deep, Smooth Bass Polypropylene Woofer And Tough Rubber Surrounds Silk Dome Tweeters For A Smooth Sound Three Tweeter Mounting Options (Hardware Included) Easily Converts to Coaxial Design With Included Tweeter Post Thin-Mount Design Easily Fits Behind Factory Grilles Grilles Included These KS separates work best with 125 watts of recommended power. See below for more details. Specifications Woofer [in, mm] 6-¾, 165 Tweeter [in,mm] 1, 25 Dome Material Silk Rated Impedance [Ω] 4 Peak Power Handling [Watts] 250 Continuous Power Handling [Watts RMS] 125 Sensitivity [1W, 1m] 91 Frequency Response [Hz] 35-21k Woofer Mounting Hole Diameter [in, mm] 5-9⁄16 , 141 Woofer Bottom Mount Depth [in, mm] 1-13⁄16 , 46 Flush Mount Tweeter Hole Diameter [in,mm] 1-¾, 45 Flush Mount Tweeter Depth [in,mm] 11⁄16 , 17 High Pass [dB], at Frequency [Hz] 12, 4,000 Low Pass [dB], at Frequency [Hz] 12, 4,000 High Frequency Output Attenuation [dB] 0, 4.5, 9