Turntable Causes Speaker Cones To Excessively Move Rapidly

I had the same problem. My turntable was a Clearaudio Performance DC, Charisma MM cart, Pass Labs phono amp, T+A 3100HV integrated amp and Wilson Audio Alexia speakers. The culprit was the Pass Labs phono amp. My Manley Chinook phono stage did not do this. I removed the Pass Labs amp and used the phono stage in the T+A. Not only did it eliminate the woofer throbbing, it sounded great. 

@dman777 

It is super freaky, right?!?!

I recently got some new speakers that I leave the grills off.  I mostly stream and when I played some records a couple weeks ago I jumped up and raised the tonearm.  My old speakers have the grills on and they are very difficult to remove so I suspect this has been happening for a while.  It does not seem to cause any harm to the speakers but it sure is difficult to watch.  I did some research and got all the same stuff people are posting here.  My issue is not isolation, I solve that a while ago, I suspect mine is the mismatch between the cartridge and tonearm.  I haven't tried to resolve, just one more deterrent for records...ugh.  That's another thread as my digital sounds just as good on most albums and I am losing the desire to mess with records.  Best of luck in figuring it out.  Let us know what happens.

@dhite71 

I just made a mismatch of an excellent high compliance cartridge (V15VxMR) on an arm made for Medium Compliance Cartridges. I didn’t realize my prior arm (SME 3009 II) was an ideal match for that cartridge, I had just gotten lucky.

OK, so, now unlucky.

I decided: solve the problem, learn something, I encourage you to let us know what tonearm you are using, and get some recommendations of cartridges for it.

@elliottbnewcombjr 

apologies for the delay

i have a rega p10 with the stock rb3000 tonearm

my cartridge is a kiseki purpleheart that replaced a benz micro wood sm

Wow! @audphile1 

I would never floor mount my tt behind a speaker.