In the the field of audio, especially Audio Car (Car Audio), amplifiers commonly referred to as power. The use of amplifiers in Car Audio system aims to strengthen the voice signal coming from the main source or the head unit which will then be streamed to the speakers.
Car Audio
So the charge amplifier receives sound signals from the signal source and process it so that the sound has more power and stronger so that the speakers are capable of removing noise due to gain maximum intake of energy needed in the release sound waves.