B-52 ACTPRO18S 700-Watt Powered 18" Subwoofer - Cast-Framed - Detachable Casters For those that demand to both hear and feel the bass, the ACTPRO18S is the ideal active subwoofer. Powered by B-52's 700-watt proprietary Class-G amplifier, the ACTPRO18S delivers deep, rich and controlled bass through the custom SP-1804 cast frame 18" subwoofer. The ACTPRO18S features a built-in third-order crossover with High-Pass and Full-Range outputs, allowing easy expansion of your ACTPRO system. Heavy-duty detachable 3" casters included. The new ACTPRO Series is a line of advanced, made in the USA, powered loudspeaker systems that offer the sonic accuracy, power and reliability demanded by today's professional performers. Fuelled by B-52's ultra-efficient Class-G amplifiers, ACTPRO systems deliver rich, clear sound at extreme SPLs. ACTPRO amplifiers employ sophisticated circuitry including acoustically tuned 4th order crossovers, four stages of equalization, a built-in intelligent compressor/limiter and short circuit/over-current protection. An extra high current output stage allows for uninterrupted extended play without risk of thermal shutdown. ACTPRO full-range amplifiers are bi-amped with fully discrete output stages. All ACTPRO cabinets are built in the USA at our state-of-the-art Los Angeles manufacturing facility. Each model features rugged birch plywood construction, durable, black Warnecke® paint finish and 16-gauge wrap-around steel grilles, all designed to withstand the abuse of the road. Custom Celestion loudspeakers and compression drivers are used in all full-range models. The ACTPRO12M is designed to be used as a main speaker or sit as a dedicated stage monitor. The powerful ACTPRO18S 18" subwoofer includes detachable 3" casters. Especificaciones: •Dimensions 26.5inch H x 23.5inch W x 23inch D (673mm x 597mm x 584mm) •Weight 97 lbs. (44.1 kg)