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Subwoofer rumble issue

I’m having a hard time solving a problem that seems to come and go. My subwoofer will rumble uncontrollably when playing records at a higher volume. If I turn the volume down sharply it goes away but when I creep the volume back up it comes back. I’ve tried isolating my turntable as much as possible with diy books, isolation feet, etc. (I don’t want to buy an expensive isolation platform unless that really is the issue.) Any thoughts on what I can do to fix this? Thx!
paulgardner
paulgardner OP
183 posts
 
I don’t have another table on hand to swap in to see if it is indeed the Concept that’s causing the issue. I might give the subsonic filter a shot before giving up on the Concept. I really do like it aside from this apparent issue. Time to play the DIY isolation game! 
paulgardner OP
183 posts
 
@georgehifi you were spot on. Stylus resting on a still record then tapped the plinth and the sub rumbled like crazy. Would a subsonic filter fix this or what’s the best solution in you eyes? 
geoffkait's avatar
geoffkait
23,365 posts
 
Hint: don’t tap the plinth whilst music is playing. Hint #2: that’s exactly what isolation is - a subsonic filter! Problem solved! 🤗
paulgardner OP
183 posts
 
@geoffkait thanks for the tips 👍 I’ve ordered a subsonic filter. Hope that does the trick!
geoffkait's avatar
geoffkait
23,365 posts
 
Paul, as Bob Dylan says at the end of his records, best of luck to you.
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