Plus One Woofer Cone Architecture: Patented (US patent #7,548,631) Plus One cones provide more overall speaker-cone area than other speakers of the same size, resulting in higher sensitivity, increased low-frequency output and greater musical character. Specified Shallow Design for More Mounting Application: Club 64FSL specified compact design for 6-1/2" that allows them to fit in just about any vehicle on the road today. That means signature JBL sound in more vehicles. Acoustically Damped, UV-resistant Polypropylene Cone: Every Club speaker's woofer cone is designed to deliver clean, non-resonant sound quality, while standing up to the demanding heat and humidity of the car environment. Bigger Magnet, Bigger Power Handling: The new Club lineup features a larger magnet delivering higher power handling than competitors at similar price points.