1'' (25mm) Edge-Driven My-Ti Tweeter with I-Mount .My-Ti (Mylar/titanium composite) tweeters. Stiff and light, extremely efficient, JBL's new My-Ti tweeters deliver the high-frequency extension of titanium domes with the damping of composite diaphragms. These are not commonly used w-domes, but full edge-driven domes like those found in higher quality home audio speakers. The benefits are increased power handling, reduced distortion, and increased efficiency. This technology also allows for better integration with the mid/woofer. I-Mount (patent no. 5,859,917) tweeter mounting system - This well thought out system allows easy and versatile installation of the GTO17t tweeter. The GTO17t also feature JBL's new Starfish tweeter mount. This allows the tweeter to be installed in a variety of factory locations