These GT Power Series 69.4x 4-way speakers feature 6" x'9" polypropylene woofer cones that deliver accurate, full-bodied sound. The Mylar tweeters, supertweeters, and midrange drivers combine to reproduce the vocal and instrumental details smoothly and cleanly. The 3-ohm impedance safely draws a little more power from your car radio or amplifier. And the signature blue color offers a look as distinct as Blaupunkt's legacy sound.