rega nd9Nd9 The best MM cartridge from Rega Rega Nd9 is the culmination of more than 50 years of experience in cartridge development and quite simply the highest performing moving magnet cartridge Rega has ever made. At its core is a boron cantilever with a Fine Line stylus profile, the same combination used in the reference model Aphelion 2. This means lightning fast response, superb tracking, and impressively precise reproduction of even the finest details.