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Simple PA systems are often used in small venues such as school auditoriums, churches, and small bars. Public Address Systems with many speakers are widely used to make announcements in public, institutional and commercial buildings and locations. Intercom systems, installed in many buildings, have both speakers throughout a building, and microphones in many rooms so occupants can respond to announcements.<br>
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What is a Public Address System? A public address or "PA" system is an electronic amplification system with a mixer, amplifier and loudspeakers, used to reinforce a given sound, e.g., a person making a speech, prerecorded music, or message over loudspeakers at the front of a room or hall. Simple PA systems are often used in small venues such as school auditoriums, churches, and small bars. Public Address Systems with many speakers are widely used to make announcements in public, institutional and commercial buildings and locations. Intercom systems, installed in many buildings, have both speakers throughout a building, and microphones in many rooms so occupants can respond to announcements. Sound reinforcement systems and PA systems may use some similar components, but with differing applications, although the distinction between the two terms is not clear-cut. Sound reinforcement systems are for live music or performance, whereas PA systems are primarily for reproduction of speech. In Britain any PA system is commonly referred to as a "Tannoy" (after its manufacturer) after the company that pioneered the technology in the 1920s. The term PA is com
