The BG Corp Neo 3 is based on planar magetic design with an aluminum conductor over a Kaladex diaphragm and powered by a row of neodymium magnets. It is quite efficient and has excellent horizontal dispersion, but vertical dispersion is not that good, so we suggest the tweeter should be ear level at listening position. Used in multiples, they make an excellent top end for line arrays. They can be rear mounted, surface mounted, or used with any of the available faceplates.