I think power cords, power conditioners, power outlets are going to become more and more important. Wall current is deteriorating, digital interference is getting worse by the day.
I cannot verify it because I have an integrated amp but most people reported that right power cord on preamp made the biggest difference. I can only say that it made big difference with integrated, bigger than with phono stage and bigger than from the wall to PS Audio regenerator. But that's in my case, experimenting with only four power cords. Best cord was best with everything as far as I could tell, Purist Dominus Rev B ferox. Good power cord should not make anything worse, and I don't try to 'tune' the system with cords.
I cannot verify it because I have an integrated amp but most people reported that right power cord on preamp made the biggest difference. I can only say that it made big difference with integrated, bigger than with phono stage and bigger than from the wall to PS Audio regenerator. But that's in my case, experimenting with only four power cords. Best cord was best with everything as far as I could tell, Purist Dominus Rev B ferox. Good power cord should not make anything worse, and I don't try to 'tune' the system with cords.

