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

Wow that's a lot of homework. As much as I would love to, I'm not going to re-create the thing I just got rid of without some possible explanation as to what was going on. It's working in single end mode and sounds really nice.

Phono stage is an ELAC PPA-2 and yes it has a balanced input option on input two. It's activated with DS 3&4.

I did the test with and without a platter mat. Platter mat only creates the pumping. Record with no mat creates the pumping. Platter with nothing- no problem.

Mat is a Funk Firm Achromat. 

I didn't say anything about DC on an AC line. (..........never mind)

Cheers

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.

PVC cannot hold a magnetic charge, though compounds used may be magnetized so to the question is whether this happens with all lps or just one.

Thanks, I guess I need to clarify my original post.

I didn’t try all my albums- it did it with probably half a dozen.