Feedback Problem


My analog rig is a VPI Prime turntable which HAD a ZU/Denon DL103 low output mc cartridge. It sits on top of my rack on a 4 inch thick air dried Maple platform. With this set up, I NEVER had any acoustic feedback. I had to send the cartridge out to Sound Smith for repair.

In the interim, I put a moving magnet cartridge on the turntable and did the entire proper set up over again. The Cartridge is a Vasari Gold MM cartridge that puts out 4.5mv. Everything else is the same, same platform and now I am getting acoustic feedback with the volume level not very high. Before any one asks, I am using the MM inputs on my preamp.

Do you think the greater output of the mm cartridge (4.5MV compared TO .3MV) is giving me the acoustic feedback? I won’t do any changes of location of speakers or TT as I’ll live with it until my other cartridge comes back but am I on to something here?

Kindly let me know,
128x128stereo5
Do you think the Dynavecter DV20X2L cartridge would be a better match for my 3D arm?
Dear @stereo5 : It will resonates at a little lower 1hz, in this regards is better option and could be a better match with that unipivot tonearm design but in audio and when we are talking of cartridge along a tonearm nothing is totally sure till we try it.

Btw, this gentleman, the OP of this thread has the DV cartridge with a VPI Classic and maybe he can help you about:  

https://forum.audiogon.com/discussions/vac-sigma-160i-se-or-arc-ls26-primaluna-dialogue-premium

Regards and enjoy the MUSIC NOT DISTORTIONS,
R.
Is it mechanical feedback from speakers over floor to the turntable? Test it with Sylomer ir squash balls under it.