Precision-tuned woven glass fiber woofer with butyl rubber surround; Rotating waveguide with 15deg increments & high-efficiency silk dome tweeter; Phase optimizing thermal pinnacle; Auto-resetting tweeter overload protection switch; High quality multi-order crossover; Gold-plated high tension terminals fit up to 5 gauge wire; Vibration-damping easy-grip motorboot; Vertical or horizontal orientation; Industry leading superior clamp-ring mounting system; Far-forward mounting for open, spacious sound; Super-slim 3mm, magnetic, frameless, micro-perforated grille; Vibration free, all-weather frameless grille may be custom painted; Square grilles also available; Black;