Buscis2...I agree that a rumble filter and/or a LF equalizer like the Richter scale, is a "bandaid". So is the use of expensive vinyl playback equipment. So, for that matter, is the RIAA equalization curve. Bandaids are often practical.
However, to really fix the root problem of LF noise you need to adopt digital discs or tape. (This would not be necessary if DBX LPs had caught on).
INCOMMING!!