@earthtones , I have a Cosmos with The Phoenix Drive system. It is perfectly normal to see a variance up to +- 0.005 RPM. Mine runs 33.336 +- 0.002. Never in a million years will you hear this. The Phoenix drive also buffers whatever power it is getting. There would have to be a very large variation before it would effect it's performance. I have watched the Road Runner with all sorts of power dipping events and nothing seems to bother it.
Linear Power Supply?
Can someone tell me exactly what an LPS supposedly does to improve the operation of a turntable motor? Does it run more precisely at a given speed? Does it vibrate less? I have a SOTA Eclipse motor with Condor and Roadrunner. SOTA is coming out with an LPS option which they say is better than the SMPS wall wart, but I want to know exactly how it’s better. If less noise in my system is the benefit, then I believe I already have that addressed because I plug it into my PS Audio P20 power regenerator.