There is some common thinking here among the answers, and I agree - start as close to the beginning of the chain as possible, then work your way down. At the panel/in the wall if you can, then outlet(s).
If these upgrades are not possible/feasible, the thinking about starting at the beginning is still the same. Start with the cable powering your line conditioner (or start with actually getting a line conditioner if you don't already have one), then your source(s) - streamer and DAC in your case.
It may seem counter-intuitive to upgrade power cords on lower power draw components before your amp, but if/when you do, the "goodness" filters through the whole system, IE. you will be amplifying a better signal/source.
Good luck!
If these upgrades are not possible/feasible, the thinking about starting at the beginning is still the same. Start with the cable powering your line conditioner (or start with actually getting a line conditioner if you don't already have one), then your source(s) - streamer and DAC in your case.
It may seem counter-intuitive to upgrade power cords on lower power draw components before your amp, but if/when you do, the "goodness" filters through the whole system, IE. you will be amplifying a better signal/source.
Good luck!