I recently needed service on my PS500 and spoke with an engineer with the Company. He indicated that the Sine setting would be best for my TT and would provide a great source for my tube pre, tube pre-pre and CD player. My system operates at about 50% and the noise floor has dropped. The Mitchell Orbe is also dead on 33 1/3. By the way, they did the repairs free and paid the transportation costs even though I'm not the original owner.
