SUNDOWN AUDIO U-6.5 Introducing the Sundown Audio U-6.5 Subwoofers! Prepare yourself for an audio experience that will redefine your expectations. The Sundown Audio U-6.5 Subwoofers are here to revolutionize your sound system with their exceptional performance and unmatched power. Equipped with a robust 400W RMS (Root Mean Square) driver, these subwoofers deliver an extraordinary level of performance. Whether you crave earth-shattering bass or flawlessly crisp lows, the U-6.5 Subwoofers are engineered to exceed your every desire What sets the U-6.5 Subwoofers apart is the cutting-edge "W" surround technology, inspired by the successful SD-4 model. This surround is meticulously designed using Finite Element Analysis (FEA), ensuring optimal mechanical performance. Its increased stiffness near the limits prevents damage and ensures the subwoofers can handle even the most demanding audio conditions. In perfect harmony with the surround, Sundown Audio is developing a specialized spider that is tailored specifically for the U-6.5SW model. This intricate combination of components guarantees flawless performance and creates an audio experience that will leave you in awe. When it comes to excursion capabilities, the U-6.5 Subwoofers offer an impressive one-way linear X-max of 19mm, reaching an astonishing 70% BL. The exceptional excursion is backed by a substantial amount of motor force, resulting in unparalleled sonic precision and impact. Unlike previous models, the U-6.5 Subwoofers are not limited by depth constraints. Sundown Audio has spared no effort in designing a subwoofer that delivers outstanding performance without sacrificing size or form factor. Get ready to redefine your audio experience with the Sundown Audio U-6.5 Subwoofers. Elevate your sound system, make a statement, and immerse yourself in the true essence of music. Prepare to unleash the power of exceptional sound!