Public address amplifier which is possible to control the output each speaker zone using an attenuator. It is possible to be announced in selected zones or all zones using 5 speaker selection switches and one ALL switch and is easy to check output signal since it has a built-in monitor speaker. Emergency broadcasting is available in sync with a fire receiver and power on/off is possible at a distance via dry contact method. Also, it is convenient to use at a distance by connecting with remote amplifier (RM-05A) and optional tuner, CD, wireless mic, etc are available according to user environment.