Hertz Uno X 690 6x9 4-WAY COAXIAL SPEAKER SET The exceptional clarity you will experience in the high frequencies wth these replacement speakers is largely due to the deployment of two 25mm super tweeters. These allowed Hertz to separate some high frequencies away from upper mid frequencies offering space and openness not usually found in speakers of this class. The elliptical woofer provides warmth and bass response below what is usually experienced particularly with standard fit speakers Technical Specification Power Handling - Peak W: 340 Power Handling - Continuous W: 85 Impedance Ohms: 4 Mounting depth : 75mm Frequency response Hz: 45 - 22k Sensitivity dB SPL: 94 Woofer size mm (in.): 6 x 9 Tweeter size mm (in.): 40 (1.6) Supertweeter size mm (in.): 2 x 15 (0.6) Woofer Voice Coil mm (in.): 25 (1) Tweeter voice coil mm (in.): 20 (0.8) Woofer magnet: High density flux ferrite Tweeter magnet: Ferrite Woofer cone: Water-repellent pressed paper Tweeter dome: PEI Supertweeter dome: PEI SPEAKER GRILLS NOT INCLUDED