Bergmann Audio Galder airbearing turntable with vacuum hold down system can accept up to four tonerams. Advantages of using air bearings: “On model Galder, the platter is centered by a steel spindle running in an ultra low noise and hard wearing polymeric bearing material, and the platter floats on a thin air cushion, which lower the mechanical bearing noise to an absolute minimum- if any. By floating on the air cushion, the platter secondly gains the advantage of a very good isolation from the surroundings.”