New Stadium Marine 10" (250mm) woofer features an exclusive dual impedance switch that lets you choose either 2- or 4-ohm load impedance option. Unique and eye-catching RGB illumination can display seven colors out of the box – or an almost unlimited number of colors when connected to an external lighting controller. The polymer basket is durable over time even after prolonged exposure to sun, salt and moisture. Rubber surrounds are more reliable than foam and offer better edge protection. Infinity speakers undergo a testing process that would destroy lesser speakers. Infinity freezes them, bakes them, shakes them, blasts them with ultraviolet light and drives them at full power for days at a time. Built in RGB LED Rings illuminate the mountint surface with a cool glow.