Abstract: An apparatus for transmitting acoustical energy from a stringed musical instrument having a bridge and string anchor to a listener comprising an energy pick-up chamber, an energy transmission member and a means for transmitting said energy to a listener is disclosed. The pick-up chamber is located at said bridge and is in resonant contact with the strings. It has at least one opening through which an elongated, hollow, energy transmission member is connected to the interior of the chamber. The means is mounted on the other end of the hollow member for transmitting the musical energy to the ears of a listener.