Turntables from $10,000 to $15,000 are machined from solid billets of aluminum, acrylic, or exotic composites by manufacturers who've been refining these designs for decades. Bearing tolerances are measured in microns. Motor systems use feedback-controlled DC or AC synchronous designs with external power supplies. Tonearms at this level are matched to the table as a system, not bolted on as an afterthought. The engineering exists to make the mechanical interface between stylus and groove as close to theoretically perfect as current manufacturing allows. That's not hyperbole. It's just physics, executed obsessively well.
