Holly, I am assuming that you re-checked all of your setup parameters as well. First try swapping out the phono stage to eliminate that possibility, since you say that you can. I have heard reports about Teres poor customer service, which is a shame, because their tables sure are eye candy. My VPI table recommends that the bearing grease and motor oil be checked and changed annually. I assume that other manufacturers have similar recommendations. However, if the platter seems to be turning normally, this probably isn't you problem. Where are you located? Perhaps a local Audiogon member may be able to assist you with the Teres platter removal. I am in the Philadelphia area.
If switching the phono stage does not improve the sound, I would next have the cartridge checked out. If you bought your ZYX from Mehran at Sorasound, I'm sure that he can get it inspected for you. If not, you may consider sending it to Peter Ledermann of Soundsmith for an evaluation. I have a feeling that the problem lies within the cartridge. In most analog setups, the cartridge is the most obvious suspect. Good luck.
If switching the phono stage does not improve the sound, I would next have the cartridge checked out. If you bought your ZYX from Mehran at Sorasound, I'm sure that he can get it inspected for you. If not, you may consider sending it to Peter Ledermann of Soundsmith for an evaluation. I have a feeling that the problem lies within the cartridge. In most analog setups, the cartridge is the most obvious suspect. Good luck.