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B-52 ACT-SERIES subwoofers are the ultimate solution for low frequency sound reinforcement. These revolutionary active subs deliver up to 135dB of deep, rich, chest-pounding bass. The B-52 digital sub amplifier is powerful enough to drive an additional passive subwoofer. ACT-SERIES subwoofers eliminate the need for additional components such as rack-mount power amplifiers, electronic crossovers, compressor and limiters as this circuitry is built-in. Available in your choice of roadworthy black paint or black carpet finish with a tilt-back handle and 3" casters.