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Today we will What talk about transistor audio power amplifier , voltage amplifier , power amplifier and and some important term in power amplifier.... What is an amplifier? A amplifier is a device that amplies weak input signal into high input signal. Their are two types of amplifier: 1) voltage amplifier 2) power amplifier. What is Transistor audio power amplifier? A transistor which raises the power level of signal in audio frequency range is called Transistor audio power amplifier. What is voltage amplifier? It is used to raise the voltage level of input signal What is power amplifier? It may be defined as the device that converts Dc power into Ac power. It is used to raise the power level of input signal. Need of a power amplifier? We know that voltage level of a signal is raised by using a voltage amplifier.buy this amplified signal does not have the power required by an electronic circuit. Hence we have to raise the power level of signal . This expla...