Plug In, Rock Out! The headphone guitar amp that lets you enjoy serious guitar sound, fast. Jamming late at night? Dont want to wake the neighbors? The amPlug Series of palm-sized headphone guitar amps make it easy to enjoy great guitar sounds at home, in your room, or anywhere. Simply plug the amPlug directly into any guitar, attach a pair of headphones, and youre ready! Use the AUX input jack to plug any CD/MP3 player right into the amPlug and jam along.