I'd go to a good solid state front end or a transformer for low output MC cartridges, especially if you are using a tube ine preamp. I use an updated Pass Ono. The Ono has a true balanced output as does its follow on X ono and sounds great single-ended or balanced. BTW, I am not anti tube, I just received my Wolcotts and they are wonderful and quiet as "the proverbial tomb."
Bat VK-P10 and Sonic Frontiers SFP 1 Signature
I recently bought a used BAT VK-P10 on Audiogon expecting it to be a better sounding phono preamp than the SFP-1 Signature. That wasn't the case. The noise floor is considerably higher and and rolling tubes did not help. Any suggestions?