The NR-2 series of pickups is our way of providing a really good sounding pickup that can be mounted quickly and easily to National style instruments without having to drill any holes for anything when installing the passive versions. The NR-2's in passive format are available with your choice of either an endpin jack or one of two jack assemblies (one with a volume control) - both of which simply adhere to the instrument and snuggle in right next to to the tailpiece. Featuring our new MVC jack assemblies, which simply attach to the underside of the existing tailpiece or the area next to the tailpiece. The MVC jack assemblies give you a much more secure and reliable mounting for an output jack assembly than anything that clamps to the side of the instrument. The jack assembly, which nestles in right next to the tail piece, is only a half an inch high and mounts to the tailpiece (not to the body). For those players who want an on board preamp, the NR-2A is the active version in the lineup and combines the NR-2 sensor with our Artist II endpin jack preamp that may be run from phantom power - so no battery need be installed.