Mackie’s Thump18S 1200W 18″ Powered Subwoofer features a professional band-pass design that delivers class-leading output and deep, room-filling lows. Designed by the world’s leader in portable live sound, the Thump18S provides ample power for high-output applications, bringing your Mackie Thump™ or Thump Boosted™ system to an entirely new level. A full set of professional input and output connections provides simple integration and sonic optimization of any system. Plus, there’s ample system pr..