Is it mechanical feedback from speakers over floor to the turntable? Test it with Sylomer ir squash balls under it.
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,