Well, most of the problem comes from from the motocross profile of a record (I am not talking about the music in the groove) with per revolution warps and cross section undulations that cause the < 33.3 Hz rumble, and there is nothing that can be done to fix this in system optimization other than to avoid playing (most) records altogether. In my experience that is where almost all the pumping is coming from. Just watch a record spin with backlighting and you can see these inch-to-couple-of inches-wide undulations. That is where the rumble comes from.
Does anyone use a RUMBLE filter?
I am having way to much cone movements on my main speakers and Sub when I play vinyl. Someone suggested I purchase a rumble filter from KAB audio. I notice that a lot of the cheaper phono preamps have these filters built in. When I purchased a more expensive better sounding unit ..it dosent have one. So I am wondering why dont a lot more companys sell these things if they are so important? I need to buy one and they dont seem to be very expensive $170 + another IC cable.