Preamplifier for moving-magnet pick-up

The basic function of a pick-up element is to translate the motion of the stylus into an electrical signal. The most popular cartridges in use are the moving magnet (fixed coil and tiny magnet) and the moving coil (fixed magnet and tiny coil). In both designs the vibrations of the stylus cause fluctuations in a magnetic field. Last month we published a preamplifier for advocates of the moving coil design; this month we turn our attention to those who favour a moving magnet element.