So Weird- No Stylus Contact Woofer Pumping with Hana ML and Elac PPA-2

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Have you tried putting the record on the metal platter (without the record mat)?

How 'bout the mat with no record?

At least you'll isolate the offending object.

Haven’t heard about this problem for 20 years. I think it has something to do with DC on your AC line. Will have to wait for the experts to return from the Super Bowl tomorrow...

Also, cut and paste the following line into google:

Cause of woofer Pumping in your speaker

Hey OP, goto the top of this page, where it says "search discussions..." and type in "pumping". LOTS of people had this problem.

BTW, have you ever heard of "clarity vinyl"? This is vinyl with NO black stuff included (clear vinyl). The reason it is clear is some feel the black stuff generates some kind of magnetic interference. If you're cartridge is super sensitive, it may be generating enough current to make the woofers "pump". Try your test using clarity vinyl.

The answer to static...

I also had a Zerostat in the seventies. Seems to me, it was four or five times stronger than the current ones. They used to use some kind of radioactive element which came with a warning to keep away from your children.

OP - Thanks for your indulgence. Think I may be developing ADD in my old age (turned 70 in Jan). Totally missed your original post.

As for the problem, damn that's weird! Got to have something to do with static elec/low humidity.

Thanks again. 

70% of people are stupid. Fortunately, I'm in the other 40%.