This research is on Design and construction of 20watts wireless public address system. It has become inevitable that there would be communication and due to the inherent limitation of the human voice, the public address system came to being. A public address or P.A 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 and distributing the sound throughout a venue . The voice signal is passed through a microphone , which converts the sound energy to electrical energy, the energy electrical signal being transmitted is been received and amplified by the amplifier circuit. The amplifiers output is fed into the loudspeaker which converts the electrical energy back to the original form but amplified sound energy. This project is made up of the power supply unit, the preamplifier and power amplifier units, and the tone control unit. This system is capable of delivering 20W of electrical power into a 8 ohm load loud speaker.
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