The Meyer Sound 650-R2 is a high-power sub-woofer loudspeaker designed to extend the power bandwidth of Meyer Sound reinforcement systems to 30 Hz. The system consists of two18-inch cone drivers in a heavily braced 14 cu. ft. vented enclosure. The dimensions of the cabinet are submultiples of 90″, the U.S. internal truck width standard. The cabinet is fitted with handles and high-density rubber casters. The 650-R2 is designed to be operated as a system with the Meyer Sound B-2EX Control Electronics Unit. The B-2EX comprises electronic crossover, Meyer Sound exclusive SpeakerSense™ driver protection circuitry, and amplitude and phase response alignment circuitry optimized for the loudspeaker.