Construction of 100 watt audio amplifier systems

Thesis Overview

<p> </p><p>INTRODUCTION Power amplifier is an electronic device which is used to increase sound energy. In other words the final stage which must drive a given load such as mechanical inductor loudspeaker cathode by tube a transmitter aerial of a communication network it is equally used to regulate power supplies.In power amplifier a large portion of the active device (transistor) characteristics used that is there is large alternating in put voltage or current to make efficient use of the device.The economic importance of power amplifier is known to useful in many aspect of both social and business activities in public address system power amplifier is very essential for amplification of signals from microphone to be heard by listeners.The system employs a pre-amp—stage that amplifier very low level output signal from a microphone too little for power amplifier. The power amplifier thus increase the signal level significantly to the level that operates the speakers.One of the most important requirements fro an amplifier is that it is reliable for if an amplifier breaks down in the middle of on concert. It can cause all sort of repercussion so reliability is very high on the list for this reasons the power transistors are one of the best choice for the input level. Hence they do not easily suffer from thermal runway as they deliver maximum power.One of the feature of this amplifier is that the harmonic distortions is 0.01% electronic decoupling is used inn the supplier the stages of the power-amp and these enables very how distortion to be maintained all power out put as well as improving the overall signal to noise ratio.</p><p>The circuit also incorporates tone control, which enables the listener to alter the tonal quality (that is frequency responses) of the sound being produced.</p> <br><p></p>