The Sound Barrier MS218SUB is an powerful Dual 18” sub bass system is ideal for any venue or performance where a power LF sub bass system is required. The MS218SUB is loaded with two MEGASSUS SBL18XN Low Frequency Drivers in a finely tuned high density MDF cabinet. The MS218SUB 3600 Watts of chest thumping lows are unparalleled when it comes to power, value and performance.