... to care about the stoppage problem,due to the speaker built-in limiting circuit and various protection circuit ,the ... is convenient to replace module when maintenance.Model BTA815Type 15 Inch Two-way Full Range Active LoudspeakerFrequency response ... factory, low price, buy, price, quotation, active dsp controlled speaker, 15 inch active stage speaker, 600w self-powered loudspeaker,Active stage monitor.