Infinity REF-FLEX8S - 6x9 Three-way car audio speakerIn the pursuit of zero compromise car audio performance, sometimes you have to think outside the box. Infinitys new Reference Flex subwoofers have been engineered to replace and upgrade factory 8 subwoofer fitments. Using our revolutionary patent pending adjustable flange, you can balance the mounting height and depth for a totally seamless and integrated fit. To further enhance performance, an ultra efficient motor and cone structure has been