HELP-woofer moves alot when playing lps

I solved that issue in my ported speakers (and sub) with some "old stock" Nakamichi rumble filters (30hz) seemingly with no audible effect on the rest of the frequencies...you can still buy filters pretty cheap on Ebay...when I switched to a line stage preamp I bought a Cambridge 640P with its 20hz switchable filter that works really well, again with no audible issues.

Do a search in discussion forum under COMPLIANCE and it will explain tonearm cartridge matching.

I said in a previous answer I use the KAB rumble filter. I consulted the manufacturers of both my turntable and speakers, and after I told them everything I tried, other than changing the cartridge and or arm, I was advised that the rumble filter was the best option without degrading the audible sound quality. The speaker manufacturer told me you can severely damage the woofer if it oscillates so much that the woofer cones exceed their parameters.

Try out the KAB filter, you have nothing to lose. You can always return it within 7 days or sell it here.

Bob

Hi, **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?**

Right the first time. It's unlikely an arm/cart resonance problem and yes the woofers can be damaged eventually, especially if they bottom out. The major cause of woofer pumping is acoustic or mechanical feedback. If you get a wall shelf or suitable support and position where your speaker isn't playing directly on it, chances are you will cure the problem. If this isn't feasible maybe you should get a subsonic filter as suggested.
Regards,

You can reduce the size of the ports with some cut foam strips (assuming your handy). This will increase the damping factor and reduce the pumping. A peripheral turntable platter clamp may also help. A subsonic filter did not have any affect in my st-up. FYI, I use a pair of ported full range floor standing tower speakers with the port diameter reduced. Note that is would be extremely rare for your woofers to be damaged. Don't let the handful of responders get you paranoid.