... etc.BTA810/812/815 is the new updating of BTA7 series, the amplifier is more high powerful (600W@8Ω),inbuilt ... for small sized fixed installation and touring performance.BTA8 Series has an outstanding sound expression and sound expression and ... manufacturers, factory, low price, buy, price, quotation, active dsp controlled speaker, 15 inch active stage speaker, 600w self-powered loudspeaker,Active ...