The Joyo AC-20 is an amplifier designed with an amplification characteristic curve circuit specifically for acoustic guitars. It gives you a nice and bright treble with rich mid -low frequencies. Its 20W of power (10W + 10W) will meet your needs for practice sessions at home up to even small live shows. The guitar section of the AC-20 features 3 built-in DSP effects: Chorus, Delay and reverb, and all of which can be used simultaneously which is very rare among similar amplifiers. The other section on the AC-20 is the well designed dynamic.Microphone amplification channel giving you a clear and powerful vocal sound, this channel also features a reverb, which is the key making your vocals shine. Any great acoustic amp has an AUX input and so does the AC-20. Connect your MP3 player or CD and jam along to your music. Joyo delivers a truly simple and practical acoustic guitar amp.