6-1/2'' (160mm) 3-way Loudspeaker with Plus One ® Woofer Cone, My-Ti Tweeter, Tweeter level control and Low-Q design.Plus One (patent pending) woofer cones - The GTO637 has a cone with more surface area than competing models of the same size. The benefits of Plus One are greater efficiency and bass output. True Four Ohm - GTO Series speakers can be safely driven by any head unit. 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. The GTO637 also uses a My-Ti super tweeter to deliver every last nuance. The GTO637 incorporates JBL's patented Intermount III mounting systems which facilitates easy installation into all four six inch hole variations
