If you're playing an electric guitar, you'll need to amplify the instrument, so you and others can hear you play. A guitar amp is important kit for playing an electric guitar. An amplifier is used to amplify an instrument. An electric guitar amp is designed to make the signal of an electric guitar louder. So that it will produce sound through a loudspeaker. An electric guitar amplifier modify the guitar's sound by changing certain frequencies and adding electronic effects.
Amplifiers consist of circuit stages which have responsibilities in the modification of the input signal. The power amplifier or output stage produces a high current signal to drive a speaker to produce sound. One or more preamplifier stages precede the power amplifier stage. The preamplifier is a voltage amplifier that amplifies the guitar signal to a level that can drive the power stage. The tone stages may also have electronic effects.