The AL218A-B is a dual 18" subwoofer that is designed to be flown or surface mounted in large format applications where high sound pressure levels are required. The unit features dual cast 18-inch subwoofers in a Baltic Birch enclosure that includes a durable finish. Each subwoofer is capable of handling 1500-watts RMS power for a total of 3000-watts. The power is delivered via an internal high efficiency, class-D amplifier. This amplifier features integrated DSP that allows the speaker to be configured via the network. Power connections are made using Powercon connectors and multiple units can be linked together via Speak-ON™ connections located on the back panel. The unit also includes the patent pending EZAL rigging system that is designed to make connecting multiple enclosures together easy in a flyable array. The AL218A-B is the ultimate way to reinforce low frequency reproduction in large format venues like arenas, stadiums, theaters, and concert venues.