Subwoofer rumble issue

Perhaps you have too much gain going to your sub or you have it crossover too high. Let us know if you find a solution. All the best

paulgardner
My subwoofer will rumble uncontrollably when playing records at a higher volume.

Your are getting "air-born feedback", and it can’t be cured with better stand mounting.

Do this.
If you just put the stylus on a record NOT spinning, turn the volume up to your normal position, one hand on the volume control, then gently tap the turntable plinth, you will see you’ll get "runaway feedback", which just gets louder and louder.
The only way to cure this is no subwoofer or the turntable goes in another room.

Cheers George

What turntable do you have? Some are more prone to this issue than others. Where is the turntable in relation to your speakers and turntable? 

I had the same problem with my 3 VPI tables (I no longer have them).  I tried everything under the sun and spent lots of cash on maple platforms, granite, special feet, Target shelf bolted to wall, nothing worked.  The KAB rumble filter which goes in either a tape loop or between pre and power amp solved the problem  It cost 179.00.  It uses all audiophile grade parts inside and there is no loss of bass or any frequency's.  I have had many different people over the house who could not hear a difference as I didn't either.

Everyone will tell you it is a band aid approach but it works and totally solves the problem.  My new Technics SL1200G does not have that problem, not sure why.

George- I’ll give that a try when I get home tomorrow. Thank you