... to buy our low price powered pro audio and check the quotation with our factory.Applications: Applications : fixed installation like ... , speech, gathering, wedding, etc.BTA810/812/815 is the new updating of BTA7 series, the amplifier is more high powerful (600W@8Ω),inbuilt ... and stability,do not need to care about the stoppage problem,due to the speaker built-in limiting circuit and various protection ...