... circuit, reduce distortion when overload, protect the speaker system avoid damage when the AMP overload, and offer ON/OFF ... has the perfect protection in infrasonic, ultrasonic, DC, overload etc., let every user to use more safe.10 ... CUT125HzON/OFF SELECTABLEINPUT/LINK XLR-MALE /FEMALEOUTPUT SPEAKONPROTECT CLIPLIMIT, OVERLOAD, DC, SHORTCIRCUIT, OVERHEAT, SOFTSTARTCONTROL FRONT PANEL: POWER SWITCH ...