Turntable and subwoofer living together in peace and happiness

I have a Clearaudio Master Innovation and use large floorstanding speakers and a six-pack of REL S/510 subs. 

I have no issues whatsoever with bass feedback/woofer-pumping, but I have also invested in great isolation (HRS EXR rack + HRS M3X2 isolation base for the turnable).

I have old wood floors that aren’t braced, I don’t use platforms under the subs (they are designed to couple to the floor anyway), and I don’t bother using the 10Hz low pass filter on my phono-stage. However, the Rega Planar 3 and my Clearaudio TT are very different animals.

Also I don’t have to tip-toe around the room. If a record is playing I have to jump up and down enthusiastically to upset the cartridge tracking...and it still doesn’t skip. Footfalls from normal walking around are inconsequential.

I’m a firm believer in isolation. I treat it as a component of equal or greater importance to everything else. I’ve also been down the road of DIY isolation solutions (that really aren’t effective enough, if at all)...sorbothane footers, hardwood cutting boards, or both blah, blah, ad nauseam. I never solved those problems until I invested and left it to the pros.

Your problem is lack of a rumble filter most likely. I have one of those highly maligned Technics SL-1200MK2 turntables with a Goldring E3 cart. Not exactly high end, I know. It sits on top of a 3-tier glass unit all in a room with wood floors.

I can play albums at any (reasonable) volume with zero effect, No T/T isolation required. I run dual HSU subs and a 330 watts into 4ohm amp. Plays clean as a whistle.

Rumble filters are mostly just a kludge that mask the root source problem, without solving anything, IMO. I’ve been down that road, had the KAB filter which was nothing but a kludge and got rid of it as a waste of money. It masked the issue a little bit. I had to solve the root problem. In my case that was a tonearm with magnetic bearings that got upset too easily. I solved that by replacing my tonearm to one with mechanical bearings. 

Rumble filters are not a panacea. In my experience they’re a bandaid that doesn’t stick well enough to prevent exposing the wound.

@horn13 I used Hana ML on 3 turntables )not on Rega though) and Hana EL on 2 tables including Rega P2 with no issues.

My recommendation would be to start with basic  troubleshooting steps  

1. Check your cartridge alignment - overhang, azimuth, zenith, VTA (this will most likely be an issue without spacers).

2. Double check your VTF. I recently had an issue with a digital scale that calibrated perfectly but lied when setting VTF by over 1gr causing mistracking. Instead of 2gr my ML was tracking at slightly under 1gr. I bought a Riverstone Audio scale and it’s excellent. Issue addressed.

Here’s the link to the stylus force gauge on amazon: https://a.co/d/07W82QL8

Deeper dive - likely the cartridge compliance is not ideal on RB330 with Hana ML. But with proper alignment you can mitigate rumble. Or get a phono stage with rumble filter  

The first thing to start with is location. Although locating turntables is corners is a no-no, you can even have issues with the table being in proximity to the corner.

I had an issue some time ago with a VPI Aries when I had stereo corner loaded subs. The table was located off center on the rack, closer to the right corner and I was getting terrible feedback but only with high playback levels of bass heavy material. Moving the table six inches away from the corner and closer to the mid-point along the front wall completely solved the problem. 

So pay attention to where your table is situated. If it is closer to one corner, just try moving it a little more center. Costs you nothing.