What you discribed reminds me of feedback. Is the TT on, or near a speaker? Place it away from the speakers (or relocate the speakers)
There is some good information here, but this response seemed to fit the bill. I went with the easiest remedy first. Because of the limited space in this house, I have everything set up in an entertainment center, tv in the middle, receiver/amp. cd player, turntable on the right, vcr, satellite box, dvd player on the left, speakers on either side of the center.
Your response made me think that I may need to move the speaker that sits next to the TT. I simply moved the speaker 2 feet to the right, away from the entertainment center and the rumble is gone! That simple. I just don't know what to do now because that speaker blocks my front door! So I move it back when I finish playing an album. I need to figure something out.
When I bought this system back in the '90's, I can't recall even playing any albums on the TT that came with it. I thought the TT was a bit cheap, and I really didn't own any LP's any more. But at that time I had a different ent. center and the TT sat in the middle, which the TT I recently bought cannot do. It has to sit in the entertainment center on the left or right side, basically next to a big speaker. Plus, back then my system sat on a solid floor, whereas this old house has a bouncy wooden floor. Heck, we even have to tiptoe across the room because the floor will bounce and make the record skip.
Which brings up another point I read here. Will a piece of carpet under the TT help with our walking across the room as well as speaker vibration? Also, the speakers sit on this bouncy wooden floor, and I'm sure this isn't helping the situation. Is there anything I can put under the speakers to "cushion" the vibration, so to speak?
Anyway, I love playing LP's again. Being on a budget I can't invest too heavily in this, so my Pioneer TT that I just bought seems to fit the bill for me, along with the used record stores I have found. I'm just happy that I never let my JVC system go, or the smaller Kenwood system that I have. I came close, but they are both here to stay now.
Thanks for your help and advice. I knew this would be a helpful place to be. I'm glad I signed up!