Neo-D Magnetic Soundhole Pickup This value-priced cousin of the Rare Earth pickup shares the same neodymium magnet structure for exceptional string balance and sparkling acoustic clarity. The Neo-D's low-profile, high-impedance design needs no battery. Easy installation with no alteration! The Neo-D is a passive magnetic soundhole pickup designed to fit most steel-string, flat-top guitars. The natural sound of your guitar is reproduced by the Neo-D thanks to a state-of-the-art magnetic field/coil structure similar to our acclaimed Rare Earth soundhole pickup. A unique arrangement of neodymium magnets is responsible for the Neo-D's excellent string balance. The pickup is specifically voiced for instruments with bronze or phosphor bronze strings.