DJ Speaker 21 Inch 1999 plus 1999 Watt Model GL21X4000HD is designed for large scale events concerts and professional DJ setups that demand extreme bass and high sound pressure levels. The massive 21 inch cone delivers deep powerful low frequencies with strong punch and wide coverage for outdoor and indoor venues. Built for heavy duty performance it handles high power continuously with stable output and low distortion. This product belongs to the Glabs range, a sub brand of ATI Pro Technologies, and is manufactured to professional standards, offering durability, reliability, and consistent high impact sound for demanding audio applications.