The JBL's SRX828SP 2x18" self-powered subwoofer system is designed for live performances, mobile and fixed DJs, sound system rentals, touring, and permanent installation. This powered system can deliver a frequency response of 35 to 150 Hz (-3 dB) and a maximum SPL of 135 dB using JBL premium transducers, 2000W peak of crown Class-D drivecore amplification, and a full user configurable DSP system with HiQnet network control (via Ethercon connection to third party router) and 50 JBL engineered application presets. The rear panel of the sub features a power button with LED indicator, a pair of balanced XLR/TRS combo input connectors, an LCD discreen with master encoder knob and back button for accessing presets.