The E218SW from QSC is a direct radiating subwoofer featuring dual 18" woofers that offer a frequency range of 32 to 230 Hz with an SPL of 136 dB. Each 18" woofer is made with a die-cast aluminum frame and 4" voice coil that when combined, offer a power handling capability of 1200W continuous and 4800W peak.

The enclosure is made from 11-ply plywood with a black textured paint finish and a perforated, powder-coated steel grille with foam lining. For connections, the rear panel offers two NL4 and one barrier strip connectors. The optional custom-fit padded cover offers protection during transportation and an optional caster kit provides greater portability.