Plus One™ Woofer Cones Harman’s patented (US patent #7,548,631) Plus One™ polypropylene cones provide more overall speaker-cone area than other cones in its class — the result is higher sensitivity, increased low-frequency output and greater musical character.
Frequency Response Up to 21kHzHear what you’ve been missing — the JBL GT7 Series offers a frequency response that delivers the full-range response associated with exceptional sound.
JBL GT7 Series speakers are the optimal choice for those audio junkies who desire an upgrade to their factory sound and style. Because they fit most factory sizes and come with mounting hardware, installation is hassle free. Featuring Plus OneTM woofer cones and a frequency response up to 21kHz, the individually voiced GT7 series speakers are designed to blow you away in both sound and style.