Why do my bass drivers shake violently listening to vinyl

I have posted this many times already but I will do it again.  I tried everything MC and other describe here, nothing worked on my VPI Prime.  I tried it on a 4 inch thick maple platform, I bolted a shelf to the wall, I moved the TT all over the room, tried isolation cones, etc.

Out of desperation, I bought the KAB filter and it was the best decision I made.  The filter is stuffed with audiophile grade parts and it does its job without altering the sound.  I run mine through a processor loop on my preamp so it is only used when I play vinyl.   Do yourself a big favor and get the KAB rumble filter.  I believe it is around $179.00.

Thanks @stereo5 I think that is the route I will go down. For my own understanding, is this a turntable feedback loop? The low frequencies being put out by the speaker are traveling along the floor, into the rack, picked up and amplified by the cartridge and phono pre and sent back out the speakers further exacerbating the issue?

I really appreciate everyone's responses. This has been a big help....

+3 On The KAB rumble filter.

@audionoobie re:

@williewonka how can I tell if the bearings have any play in them? Not sure what you’re referring to.

Simply hold the arm between thumb and finger and gently push/pull the arm - if there is play you will feel a slight movement or feel a clicking

This is not common, but can occur - if this is the case the beerings need adjusting (if possible)

Regards

@erik_squires Excellent post!!