Featuring 150 Watt power handling and low distortion, the long-excursion 200 mm (8 in) low frequency driver features butyl rubber surround for well-damped, tight sound quality and long-term reliability, and a polypropylene-coated cone for humidity protection. The high-temperature 50 mm (2 in) voice coil and low-mass fiberglass coil former ensure good bass transient response and excellent stability under high power, high dutycycle, working conditions.