Lovely 15++ Acoustic And Electric Guitar Amp. Acoustic amps are voiced similarly to pa systems, where guitar amps are, well, designed for electric guitars. Here we look at the best rated acoustic amps, based on analysis of the most recent reviews and. Acoustic guitar amps are specifically designed to amplifier the natural sound of your guitar. Electric guitar amps amplify an electric guitar signal providing more gain (for distortion), volume, effects for diverse sounds whilst slightly coloring the tone.