Could be something is oscillating in balanced mode but why would it go away when you removed LP and mat? Neither of which can “store energy” for more than milliseconds. And it would be kinetic energy, not electrical.
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:
I could type out all the details but the video pretty much covers everything. I thought ya’ll might be interested in this.
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One or several points on the platter that are magnetic, not the whole platter. The effect would be a similar to a Hall effect sensor. Your MC cartridge is acting as the pickup. Yes, the platter needs to rotate to make it work. I’d venture a guess that you would see the woofers pulsing just by turning the platter slowly by hand. |
Plastics can hold and build a charge see the OSHA Warning https://www.osha.gov/publications/hib19880930 |
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