JBL  JRX118S Single 18-Inch 350W Continuous, 1400W Peak Passive Sub Bass Loudspeaker (with Pole Mount) JBL 18 in high power woofer with a cast frame and 3 inch voice coil Solid Perforated Kick Proof 18 gauge Grille to protect ithe speaker form damage Tough acoustically Superior enclosure constructed using 19mm MDF for improved LF performance Non resonant Steel Handles Top Mounted 35mm Pole Mount socket for JBL's SS3-BK Pole