Loading... Please wait...The SteinMusic Magic Stones are triangular shaped and made of a polycarbonate material. They are meant to be placed on the wall behind and between your loudspeakers, on the wall behind your listening seat, on loudspeakers, and in room corners. They are part of the SteinMusic Harmonizer System and meant to work in conjunction with the H2A and H2B harmonizers. Price is for one Magic Stone.