RCF NX 15-SMA Powered Speaker. The NX 15-SMA is outfitted with a brand-new, high-power 700 W digital amplifier and a specially created, 15" coaxial neodymium transducer that both ensure the system's exceptional audio quality and definition and make it incredibly lightweight. Thanks to the sturdy steel pole mount made of powder-coated steel that is mounted on the side, the NX 15-SMA may also be used as a portable PA system. RCF has included two specific Equalisation Modes: Floor, for stage monitoring, and Free Field, for using the speakers as a stand-alone PA system, to regulate the speaker's response in these various situations.Cabinet is constructed from Baltic birch plywood and painted with a highly durable finish for extensive use on the road.