Public Address System (PA System), is an electronic sound intensification and sharing system with the use of an amplifier, microphone and loud speakers which permit a person to address a large public, helps the groups to enjoy the get together gathering events and music concerts. Simple PA systems are often used in small venues such as school auditoriums, Government service centre and small company work places.

PA systems with many speakers are widely used to make announcements in public, institutional and commercial buildings and crowded places such as airports. Some PA systems allow the occupants to respond to the announcements with a microphone provided at the rooms.

Public Address Systems can easily be installed as a simple stand – alone system or it can be integrated within CCTV, Access Control or fire Alarm systems. One of the most flexible features of public address system is its vast range of use.