DJ Speaker 21 Inch 1999+1999 Watt Model GL21X4000HD is engineered for extreme sound output and deep bass performance in large scale professional audio setups. It is ideal for concerts outdoor events DJ shows and high energy stage applications where powerful low frequency impact is required. The heavy duty construction supports high power handling and stable performance during long hours of continuous use. Strong design helps maintain clarity even at high volume levels. Glabs a performance driven sub brand of ATI Pro Technologies offers this DJ speaker for professionals who demand durability high efficiency and massive sound output for big events and live performances.