Do you have another cartridge to try? That would eliminate some guessing.
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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+1 @cleeds feedback. Your turntable is too close to something like a speaker etc. |
As you look at the video you pick up that the oscillations are rhythmic and that rhythm occurs at 33.3 times per minute. I think @ Lewm hit on it. There is either Iron in the platter or a sensor magnet that is inducing a voltage in the cartridge. That oscillation will cause distortion in the woofer. The solution is a less sensitive cartridge or a different turntable. |
What kind of table & arm? With that nice cartridge, I’m guessing it’s probably a pretty good quality one but it seems to me that if this only occurs when the platter is spinning, it’s a mechanical / vibrational issue in the plinth / tonearm connection, /suspension components or maybe the bearing. A relatively cheap stethoscope you can get from CVS can help to locate the culprit. |
- 167 posts total