A public addressable system comprises equipment, such as microphone, amplifier and speakers. It is also called as a sound enhancement system, as it is mainly used in events and concerts to increase the volume of announcer, singer, instrument, etc. It is mainly used in music events, trade fairs, sports grounds, etc. Not just large events, this system can also be used in small events in schools, temples and churches. Customers can choose a public addressable system from different brands, like Agni, Simplex, Tyco, Bosch, Ravel, Siemens, Notifier, Edwards, GST and Honeywell.