The Turbosound TMS153 is a 2 way full range and a switchable passive/bi-amp 15" 4,800 Watt loudspeaker system and perfectly suited for a broad range of portable speech and music sound reinforcement applications. The Turbosound TMS153 is designed to work in conjunction with TURBOSOUND loudspeaker management systems, also, the Turbosound TMS153 gives an optimal sonic performance for FOH, side and drum fill applications that demand very high output levels.