cable connection

Source to pre-amp/integrated amp.

Thankfully a choice I will never have to make, having been smart enough my whole career to run integrated amps. But if I ever did go separates I would like to think I'd be smart enough to know the best cable goes between the pre and power. That way every source always goes through your best IC. The idea of once its lost upstream is a red herring. At least I think that's what its called. Do herring even swim upstream? Nevermind. The herring is a MacGuffin anyway. 

Power cable wall to amp would be my first choice, then power cables to components, then moving on to interconnects.

I started off spending a lot of effort on interconnects never focusing on power.  When I demoed a full loom of Ansuz power cables and conditioner I was floored at the difference it made in my system.  It completely changed the sound characteristic to the better.

I’m with eziggy on this one. Power first. It can make all the difference. Then pre>amp...

Hi,
i would expect the preamp->power amp to have the bigger impact. Consider them as one unit.