JBL EON618S Portable 18" Self-Powered Subwoofer JBL premium transducers 1000 w highly efficient Class-D amplification Maximum SPL output: 134dB System type: self powered 18 Subwoofer 3 parametric EQs + hi & Lo shelf gain and delay save and recall settings polarity Inversion Input: balanced combo  / XLR (x2); Output: male XLR (x2) AC input voltage: 100  240VAC (10%), 50 / 60Hz Purchase includes: EON618S subwoofer, 10-foot power cord, and quick-start guide Pair with the EON610, EON612, or EON615 for an affordable portable system with studio-quality sound