... and regions4.Most are CE and RoHS certified.Loudspeaker, power amplifier, line array system and are our main professional audio products. ... down diffusion, the sound propagates farther.4,Built-in 3000W digital amplifier, built-in DSP module and humane bass design5,One people ... Optimum System in our management. We have the world top-ranking DAAS, EASE, SMART LIVE, INT, America AP amplifier tester and ...