6-1/2" 3-Way Loudspeaker with Plus One® Woofer Cone and 1" edge-driven My-Ti™ Tweeter and 1/2" My-Ti.™ super Tweeter. The GTO638 also feature JBL's Intermount III mounting system, allow it to be installed in all 6" hole size standards.Plus One® (patent pending) woofer cones - The GTO638 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. True Four Ohm - GTO Series speakers can be safely driven by any head unit. 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. The GTO638 also uses a My-Ti supertweeter, which delivers every last nuance. Intermount III (patent no. 6,505,705) mounting system - The GTO638 incorporates this proprietary mounting system, which facilitates easy installation into all four six-inch-hole variations.
