When we first debuted the original "Dualie" pickup approximately ten years ago, it was designed to be used on acoustic and classical guitars.......And then a funny thing happened: musicians discovered that they could stick the Dualie onto just about anything and that it worked and sounded great. Basically, if you have an acoustic instrument with a soundboard, then the Dualie will work well on it. The pickup sensor is light in weight (a couple of ounces), and does not inhibit top movement or vibration.