Dynamic Balance driver technology for pure, distortion free sound. Polymer woofer cones and butyl rubber surrounds will not break down over time and will survive the rigors of harsh automotive environments. High temperature copper voice coil (50mm) and polyamide former stands up to the most rigorous use while maintaining extremely low distortion for bass punch and output. Nickel plated heavy duty input terminals accommodate speaker wire up to 8 AWG or twisted pairs of 12 AWG. Carbon composite basket based on the spokes of a wheel is lightweight, will not flex during peaks and looks great! Don"t be afraid to show off the back of your woofer.