for accuracy and detail that may surprise you. Infinity Reference Series loudspeakers continue to be the top-selling premium speakers in the world. For instance, the 6-1/2-inch Reference coaxial model has been the number-one-selling car audio multielement speaker for five years straight. With proprietary features such as patent-pending Plus One cones, true 4-ohm topology, UniPivot edge-driven tweeters and the industry-leading Intermount III and I-Mount mounting systems, as well as the Starfish tweeter-mounting adapter, Reference Series speakers leave the competition scrambling to keep up.  (less)