- JBL's Thermalum woofer cone is a hybrid material that combines polypropylene and a nickel alloy.
- JBL's Thermalum woofer cone is a hybrid material that combines polypropylene and a nickel alloy. The combination of these two materials delivers a cone that is extremely rigid yet lightweight. - Will fit both 5 x 7"" and 6 x 8"" factory openings. - Butyl Surrounds are used to guarantee long-term reliability by rejecting moisture and ultraviolet contamination. - JBL's NeoGlass tweeter provides flawless frequency response clear out to 22kHz. - A Powerstat cast polymer basket creates a non-resonant platform improving midrange clarity and significantly reducing distortion
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