Matt, I finally went and read a few of the most recent posts on your other "woofer pumping" thread. I think Rodman9999 et al have a good point; the periodicity of the woofer pumping, plus your statement that the problem is not the same when you revert to using your older tt (which you have not mentioned here), absolutely points to a defect in your new turntable. I don't know why it is so difficult for you to face that fact, but the remedy should be to return it for repair or replacement, since you bought it new from a dealer, apparently. Also, if you are going to run two separate threads about the same problem, it is wise to keep the respondents to one thread informed regarding what is posted on the other thread.