ELIAS PX. Equipped with a controller, crossover and power amp, every speaker unit in the ELIAS PX system is a standalone solution that does not require a central system controller to operate. This affords you greater independence and flexibility to adapt your rig to suit the situation: Leave the bass bins behind for smaller gigs, and bring them along for bigger venues. The EPX 112 A Mid/High unit as a full-range cabinet to achieve professional results for voice public address in medium-sized venues and for band gigs in pubs. To treat your audience to a muscular low-end thump for big, bold drums and other burly bass signals, simply set up the entire system with the EPX 115 Sub A subwoofer. Adding another pair of subwoofers to the sonic equation transforms the ELIAS PX into a full-grown PA that lets bands play bigger halls and DJs rave it up.