The Professional Power Amplifiers are used to amplify the analog signal & efficiency of the microphone or any other device. They are used by experts to boost up the quality of the signal. They are used by peoples in DJ system, Concert audio systems, cinema halls, etc. Apart from this they enlarge the signal using the concept of the amplifiers. They can be used to output the big loudspeaker load and can supply high peak currents required to drive low impedance speaker.