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 ed…