The JBL EON 515XT Portable Powered Loudspeaker is the big brother to the EON510 and was engineered for durability, high performance and ease of use. JBL extended the reach of the current EON technology by improving input sensitivity, lowering the noise floor, adding user selectable EQ control and re-voicing the system for peak performance and enhanced audio precision. The intuitive onboard 3-channel mixer with adjustable EQ assures that youâre in control of the sound and the sturdy construction and superior ergonomic design will guarantee a lifetime of reliability and simplicity. A truly great sounding powered loudspeaker. An Ellumiglow.com staff favorite!