Tzh,
If you think it is vibration, from perhaps possible interaction from speakers, one way to eliminate that possibility, is try the set-up with headphones, or play at a lower spl level.
I've owned a couple of Benz Cartidges, the Glider, and the Ruby 3. Benz Cartidges have generally been known to be very excellent trackers, and also very versatile cartridges, working on virtually every arm without problems.
Stick with it, checking, and eliminating possible causes one by one, I'm sure you'll come out in the end trimumphant. Mark