Kicker Speaker Bundle - Two pairs of Kicker 1 Inch KS-Series Tweeter 41KST254 Two pairs of Kicker 41KST254 1" 4-Ohm Silk Dome Tweeters Power Handling Per Tweeter 150 Watts Peak/75 Watts RMS Frequency Response 3500 - 21000 Hz Impedance (Per Voice Coil) 4 ohms Cutout dimensions: 1.75"