A public address system is an electronic system comprising microphones, amplifiers, loudspeakers, and related equipment. It increases the apparent volume of a human voice, musical instrument, or other acoustic sound source or recorded sound or music.

• Public Address system is designed to offer clear reproduction of sound and intelligibility of speech even in high noise areas.
• Public Addressing system uses high-reliability amplifiers with built-in overload protection circuitry, short circuit protection, open-circuit protection, and thermal protection.
• The system can transmit alarm tone and routine voice messages, from a central location to all or selected areas of the facility, in a reliable and safe manner, by the use of loudspeakers.
• The entire operational area/facility can be divided into one or more zones, which can be accessed independently either for announcements or for alarm broadcasting. The loudspeakers are installed in these zones.
• There are no limitations to a number of zones in the system or number of loudspeakers in each zone. Each loudspeaker is connected to the central equipment for amplification and other control functions.
• Depending on the surrounding environment, either flameproof loudspeakers (for hazardous atmospheres) or weatherproof loudspeakers (for safe & non-hazardous atmospheres) or indoor loudspeakers (for indoor areas) are installed in each zone. The loudspeakers are available in different wattage, sizes, types, and constructions.
• Multiple control desks can be installed in the same system, for paging access (with priority) from more locations.