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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
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.
tbromgard OP
814 posts
 
Thanks Swampwalker-
Yes, it happens only w/ the needle in the groove and the volume turned up.
ths364
181 posts
 
Try engaging the subsonic filter if you have one-sometimes lps can have a slight warp or off center spindle hole that cause spurious low frequency excursions.
sounds_real_audio
984 posts
 
Switch on your low pass filter.... that will solve the problem..
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