02-26-13: Fromunda
Fosgate sig was the last addition. But I believe the hum was there before as well.
02-28-13: Fromunda
Yes previous phono stage was Pro Ject Tube box MK11.
High efficiency system? Check. New tube phono stage hum? Check. Previous tube phono preamp hum? Believe so. Alright, what am I missing?
Sure, you can try another cartridge if that's what you want to do.