Balls.....

At least on my high end bicycle, ceramic bearings in the hubs are the final word zero rolling resistance(at least it feels that way!)

I would think the same lesser resistance results in lower noise?

Upgrade asap for much better sound.

Thanks for the responses. What type of turntable did you perform the upgrade upon ebm? Was it a diy project?

wturkey, I doubt it will make a big difference. It might effect noise levels but for better or worse? Depends entirely on the quality of the bearings and the type of cup or thrust plate being used. If your turntable is quiet and running well I would leave it alone. If the ceramic bearing is inexpensive then you have not much to lose trying it. It would be interesting to test rumble levels before and after the switch.