JBL EON615 15-Inch Two-Way Multipurpose Self-Powered Sound Reinforcement. With Free Covers, Stands and 2 XLR Cables. Optimized for ideal acoustic resonance taking advantage of injection molding techniques and mechanical shaping of the enclosures. JBL engineers examined the radiation characteristics of the EON's high and low frequency drivers at 36 different points employing JBL's exclusive, state of the art measurement techniques, then designed individual waveguides for both components. JBL engineers developed an iOS and Android supported Bluetooth v4.0 compliant interface for controlling master volume, adjusting the 5-way, user definable parametric EQ, and saving and recalling user presets.