JBL GTO6286-1/2" Two-Way Loudspeaker with Plus One® Woofer Cone and 1" edge-driven My-Ti™ Tweeter. The GTO628 also feature JBL's Intermount III mounting system, allow it to be installed in all 6" hole size standards. The JBL Unipoint™ rotating Tweeter pod is also included allowing Imaging to be optimized based on Speaker location.Plus One® (patent pending) woofer cones - The GTO628 has a cone with more surface area than that found on competing models of the same size. The benefits of Plus One cones are greater efficiency and bass output. My-Ti™ (Mylar®/titanium composite) tweeters - Stiff and light, and extremely efficient, the new JBL® 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. Intermount III (patent no. 6,505,705) mounting system - The GTO628 incorporates this proprietary mounting system, which facilitates easy installation into all four six-inch-hole variations. True Four Ohm - GTO Series speakers can be safely driven by any head unit. Unipoint™ rotating tweeter pod - Allows the tweeter to rotate 350 degrees so it can be directed for optimal imaging. The GTO628 also includes a tweeter-level control for easy adjustment of tweeter output, even after installation.