The Schatten RG-03 is the 'original' center mount pickup for spider bridge resonator guitars. The design of the RG-03 mounts the piezo element directly on center on the underside of the resonator cone on 'Dobro' style single-cone instruments. This placement of the piezo unit is the best for tone and provides the best feedback resistance.
Until Schatten designed the RG-03, all resonator pickups were either stuck onto the side of the cone (which invariably caused feedback issues) or else required the replacement of large parts of the resonator assembly (not to mention a lot of expense and probable modification to the instrument). There also were some magnetic pickups that were meant to fit under the strings at the end of the fingerboard - but these were never particularly acoustic sounding.
It took several years to accomplish but Schatten finally produced a resonator guitar pickup that met their exacting standards for faithful sound reproduction, ease of installation, great anti-feedback characteristics, and so much more.
This high output pickup will work fine when plugged directly into an amplifier. If you are plugging into a PA system or mixer board you may need a preamp to increase the signal strength to match that system. We recommend the Schatten Mini-Pre preamp for this situation, or you may want to consider the RG-03A model instead, which has a preamp that can be externally powered.