Elevate your sound Experience dynamic sound with astonishing clarity. The woofer with Lightweight Rigid Cellular diaphragm provides power and depth, while the component soft dome tweeter gives the best stereo sound staging in your vehicle. Lightweight Rigid Cellular Aramid Fibre Matrix Diaphragm The diaphragms for the woofer and mid-range driver are crafted from Sony’s unique Lightweight Rigid Cellular material, formerly known as mica reinforced cellular. The latest generation compound has been further optimized alongside mechanical driver improvements, to deliver an even wider frequency response and smoother, more natural sound characteristics.