We are manufacturer, professional power amplifier 1, 100W 150W 200W 280W 380W 500W 680W 2 ... ISO,CCC,CE, Certifica We are manufacturer, professional power amplifier.1.100W 150W 200W 280W 380W 500W 680W2.Has ... override background music4. All microphone, line volume, treble and bass volume can be regulated independently5. Has 6 individual zones, ... it own volume separately 6 Areas Mixing power Amplifier