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


I observed the weirdest thing I have ever seen in audio. With the cartridge positioned above the record, tone arm locked up and platter spinning, the woofers were pumping on my system. I googled every permutation of query I could think of but came back with no hits. That’s when I decided to video the problem- link below:

Mystery Woofer Pumping

I could type out all the details but the video pretty much covers everything. I thought ya’ll might be interested in this.

 

mitchellcp

Uh, see my previous post. You can still try it and report back. I suspect the problem goes away when you remove either the record or record and mat because the spinning magnetically charged item (record or mat or both) excites the improperly connected cartridge whereas the aluminum platter does not.

@fsonicsmith I thought that if I got continuity from cartridge white pin to XLR L pin 2, blue to L pin 3, red to R pin2 and green to R pin 3, and if George Cardas welcomed to the right channel on the right side and in phase was in the middle I was pretty good. What did I miss?

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.