from a review of a Music Hall Turntable
" The platter, main bearing, and tonearm are all mounted to the top plinth layer, while the bottom layer houses a set of three threaded, adjustable conical feet (complete with anti-scratch cups) and the gold-plated single-ended stereo output jacks. The logic of using only three isolation cones as footers is remarkably sound, pun intended. Euclidian geometry teaches us that while two points are necessary to describe a line, only three are necessary to describe a plane, with more than three being superfluous. In fact, with four, one of the four will almost certainly be "floating" off the surface under the device being supported by the first three. From an isolation standpoint, I wish more manufacturers would employ only a troika of isolation feet, as such an arrangement allows for the more stable support of any component. Kudos to Music Hall for adopting this stance."
" The platter, main bearing, and tonearm are all mounted to the top plinth layer, while the bottom layer houses a set of three threaded, adjustable conical feet (complete with anti-scratch cups) and the gold-plated single-ended stereo output jacks. The logic of using only three isolation cones as footers is remarkably sound, pun intended. Euclidian geometry teaches us that while two points are necessary to describe a line, only three are necessary to describe a plane, with more than three being superfluous. In fact, with four, one of the four will almost certainly be "floating" off the surface under the device being supported by the first three. From an isolation standpoint, I wish more manufacturers would employ only a troika of isolation feet, as such an arrangement allows for the more stable support of any component. Kudos to Music Hall for adopting this stance."