At the heart of the JBL SRX725 system is a pair of 15″ Differential Drive speakers that handle an astounding 1,200W RMS power, 4,800W peak. The 4″ compression driver is one of the finest high-powered drivers made, providing smooth, clear mids and highs. A 75° x 50° dispersion pattern assures total audience coverage. A pair of these cabinets with a high-powered amp will give you the ultimate blend of performance and simplicity. The rugged construction makes these audio speakers road-ready and eliminates acoustic losses. Add a SRX718S 18″ Subwoofer (not included) for even more low end!