Does anyone use a RUMBLE filter?

No arm/cartridge mismatch here.
Some vinyl is 100% ok, no pumping at all, and some lp's are for sure the source of the rumble (you hear it on all the turntables I try).

agree with newbee, but also agree it won't hurt to have one if your phono doesn't have one. old records warped records may tend to rumble especially at higher volumes with risk of damaging speakers.

I am thinking that Rauliruegas AND Newbee have some valid points. This is why I do not want to buy one if I can help it..I think there is something wrong in my system...Today I am trying a completely different table and Cart..Thornes TD160 with a Nagaoka MM 4.0 output. Once I run some more tests I will re-post my findings....Thank you for the responses I agree that there is something wrong in MY setup that is causing this AND I am sure it has to do with Cart compliance and tone arm mismatching....more to come.

Why filter anything from your megabuck stereo. The idea is to get it all. Set your vinyl rig up correctly and it will sound fine with no additional band-aids.

Well everyone has an opinion of course. Perhaps some might be interested in Harry Weisfeld's; he probably knows a bit about vinyl. Then again, maybe not?

http://db.audioasylum.com/mhtml/m.html?forum=vinyl&n=1041937&highlight=subsonic+HW&r=&search_url=%2Fcgi%2Fsearch.mpl%3Fsearchtext%3D

Sometimes (actually many times) woofer pumping will not be the result of poor setup and sometimes (actually many times) a good subsonic filter is a very good idea.

You won't "hear" negative results with a good subsonic filter-quite possible though that you may hear the positive results of not having your woofers flap around in ways that they were not intended to as well as having all the power sucked out of your amplifier by the subsonic frequencies.

I'm sure there may be bad subsonic filters out there. The KAB is not one of them (IMO), having used it. I also like the subsonic filter in my phono preamp.