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 7 responses by tbromgard

Thanks Swampwalker-
Yes, it happens only w/ the needle in the groove and the volume turned up.
I have a Musical Fidelity integrated amp-there is no subsonic filter...how about a inline filter to remove rumble...does anyone have experience with such a filter?
Dan_ed

I suspect you are correct that it is NOT cart/arm mismatch (its rega and clearaudio). If I ignor the issue, wont the woofers be damaged by too much pumping?
Yogiboy-
How do I address the mismatch? Should I get a different cartridge? Thanks.
Thanks for the responses. I purchased the KAB filter. I dont believe isolation is an issue-the TT is well isolated. Also, the tonearm manufacture believes cart/arm mismatch is not the issue. The arm and cart are both medium mass/compliance and should work fine togther-so I dont think that is an issue either. I really dont want to add another circuit path for the signal to run, but it seems inserting the KAB filter is my best choice. I will report the results once I rec'v the unit. Thanks all.
As it happens, the Clearaudio Concept MM I purchased-broke. The needle was slowly moving to one side of the cartridge, and now is totally limp. I am going to return it as it seems to have a manufacturing defect. I purchased the Orotfon 2M Blue, which will arrive soon. Hopefully once it is installed I will not experience woofer pumping.

Thanks again for the responses.