Music Direct has a set of specially made carbon fibre footers from Black Diamond Racing for the Aries to help aid in vibration control. If you have a sound level meter, such as those inexpensively available from Radio Shack, and a CD with bass test tones, such as is available from Stereophile, move around your room with it to get some base line readings and then check the area where the turntable is positioned. If the SPL is above the level of your base line readings you have sited your table where a bass mode is prevalent and it should be moved. You can also try this by ear, using a record with heavy bass, but it takes a bit more practice. You will have to put your ear in the general vicinity of the turntable. If you would like a visual indication of the amount of vibration reaching your turntable just play bass heavy music on your CD rig and put a glass of water on the platter, or remove the turntable and place the glass on the rack. Finally, to check for feedback, place the needle on the groove with the turntable off, as in not turning. Increase the volume on the preamp. If you hear howling then you have a direct feedback path. Oh, and turn it down real quick. Yeah, I have way too much time on my hands. Good luck.
