... indicators such as Power. Signal.Protect and Clip.- Full protections on each panel automatically protects amplifiers, such as DC,thermal,overload ... ,1 Clip ,1 Protect)Power switch Front panel Push On/Push Off mains power switchBridge/Stereo switch Rear panel slide switchInput Connectors ... fan Front-To-Back airflowAmplifier protection Thermal, DC ,mismatched loads,On/off muting Professional PA amplifier