DESC: A great set of wheels deserves a world-class speaker component system. Based on technology adapted from Polk Audio's top-of-the-line award-winning LSi home speakers, the SR6500 Signature Reference series 6 1/2” component system is for people who want the highest-performance sound for their high-performance wheels. The SR6500 can be used either as a separate component system or converted into the best dang coaxial speaker on the planet. The tweeter can be used either as a separate component or post mounted coaxially with the driver. Two flush mount cups (straight and angled) and two coaxial posts (straight and coaxial) are provided for the ultimate in installation flexibility.