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HELP-woofer moves alot when playing lps

Hi-
When I play a record on my TT, I get an excessive amount of woofer movement, even when no music is playing. When I lift the arm off the record with the finger lever, the movement stops, and the phono stage is dead quiet. Its only when I drop the needle and turn it up a bit, the woofer starts to move in and out. I dont get this when playing cds, only lps. I have my system on a shelves, with the table onto and my integrated amp directly under my TT. Might this be an isolation issue? Thanks in advance.
tbromgard

Showing 1 response by swampwalker

swampwalker's avatar
swampwalker
5,138 posts
 
Might this be an isolation issue?
Yep.
Mightl also be rumble from the TT motor or possible arm/cart resonance in the subsonic/low bass range. If it ONLY happens w the needle in the groove and the volume turned up, I'd have to think that acoustic feedback is the issue, whether air-borne or structure-borne.
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