The JBL SRX818S Passive Subwoofer System features an 18" woofer, a 600W continuous output, a maximum SPL of 135dB and comes in a plywood cabinet. The SRX818S is a single subwoofer for concerts, touring, or installations. Featuring a standard M20 pole cup for use with top boxes, indexing feet for stacking in both the standard and cardioid position, and a 136dB max SPL, the SRX818S is ideal for musicians, bands or DJs.

Tunings and presets are available for Crown ITech HD and XTI 2 amps as well as dbx VENU360 signal processors. Featuring a rugged, versatile enclosure, this subwoofer has ergonomically designed handles that support an easy grip for streamlined handling. M10 suspension points, indexed feet, and pole/tripod mounts support a wide, flexible array of configurations.