| - THERMAL PROTECTION & AUTOMATICIDLING CIRUITRYThermal protection circuitry is provided forstability and reliability against over-currentand over-heating. Automatic idling circuit isalso provided to protect against thermalrun-away.- MUTE START SYSTEMTo protect speakers and remove pop noise,start operating after 1 second.- BALANCED INPUTTo allow you to build reliable system, abalanced input is provided to reduce humpickup from a long distance input cableand to avoid group-loop problems.- USE OF EMERENCY BATTERYYou can operate the power amplifier byusing emergency battery for unexpectedAC power failure. | 
