Publicity announcement sound system within the school which is divided into public relations noise in the school building and lawn and playground. To be heard everywhere you want. But the announcement must not disturb the people's houses or disturb the least. (Due to the original sound system, the noise disturbed the people until they were complained). The installation of sound systems in the school building is used as 24 speakers of 6 1/2 inches, distributed at various points. and the lawn in front of the school is used as a loudspeaker 7 wide range horns, the installation emphasizes the audible position. Do not turn up the volume By using a separate power amplifier to control the volume to be as limited as possible.

The main audio equipment used in the system consists of

Product manufactured by NPE Industry (Thailand) Co., Ltd.

- Speaker cabinet 6 1/2 inches 2 way LINE white model HB-602T NPE

- LINE AMPLIFIER model LA-250 NPE

- LINE AMPLIFIER model LA-1000 NPE

- STEREO GRAPHIC EQUALIZER model GQ-231L NPE

- DISTRIBUTION AMPLIFIER model DA-408 NPE

- CHIME MICROPHONE model CM-1000P NPE

- POWER DISTRIBUTION RACK MPR-208VA NPE

- QUICK RACK 19" WITH DOOR PANEL QRd-16U NPE