The job of an acoustic amplifier is to recreate the natural sound of your instrument as accurately as possible. Acoustic amps only have a clean channel as opposed to an electric amps clean and overdrive channels. They do have another channel although this is for microphones. A useful combination for any singer songwriters performing small venues and clubs. In a way acoustic amps can be seen as a self contained PA system. As with other amps there are EQ controls to shape the tone and they often have effects built in that compliment acoustic guitars such as chorus and reverb. The power of acoustic amps can start from around 15 watts up to 100 watts and more.