All the great jazz, folk and contemporary strings players of the violin, viola , Cello, and acoustic guitar. Who suffer from plugged in sounding like a kazoo , and wish you could only play acoustic, because of the endless soundchecks that never gets it right, and the disillusion from playing with a crummy sound night after night. I can help you, permanently. Users of the stringAmp say: "nothing else comes near!" and: "after StringAmp- there´s no going back".