6 responses Add your response
If the phono section has RFI problems, it really should be something addressed by the manufacturer. Its a bit of homework that only they can address correctly. I know you may have a solution, but the fact is if the preamp is sorted out correctly (made RFI immune) it will also sound better and likely will seem quieter.
You could try ferrite ring(s) and wrap the phono cable through it several times. This is a easy fix if it works. Also, you can braid the cart. leads of the tonearm prior to connecting to the cartridge pins, but be gentle.
If there was a phono RFI/EMI issue I've had it or have it. I can't use a SS phono preamp in my system. I'm just glad I found that tubed phono's defeat most of the RF/EM issues I have. I still have issues but they are manageable now.