Help selecting a power cord.


All my gear has the factory supplied power cords  I’m ready to try 1 aftermarket power cable as a test.  So what brand power cable should it be and what device gets it first?  Tube pre?  Tube main?  D/A?  CD transport?  Roon Nucleus?  Subs?  GE Trefs?? Turntable? Oppo 103?   Which piece of my gear should be most affected by the improved power cord??  I look forward to the responses and will likely choose the cord that has the most recommendations.
128x128fastninja12
What a potentially confusing collection of responses!

You feeling overwhelmed ninja12?

I don't belive you ever stated your budget.
That would've helped. 

Power conditioning might or might not be worth the investment. 
Where I live, the power is very clean-- I tried a PS Audio regenerator
in my system and could hear no difference, nor could the dealer. 
YMMV.

Your initial post discussed starting with one power cord-- perhaps you ought to stick with that idea for now, before diving into the "Power Product Vortex". 

You've been given some suggestions for power cables, at a variety of price-points. 

My experience concurs with those who suggest you start by upgrading the power cord to your amp/integrated. Order from a company that will give you a trial period and refund, should you elect to return the cord.
What have you got to lose? (OK... shipping costs, but that typically doesn't add up to much). 

Finally, this may be helpful:

https://audiobacon.net/2019/08/17/27-audiophile-power-cables-reviewed/

Unfortunately, the Audiobacon cable review as all other suggestions is only an opinion which many will disagree with.
@lak:

  "Unfortunately, the Audiobacon cable review as all other suggestions is only an opinion which many will disagree with."

One has to begin somewhere. One can research the opinions of others or not-- utilize them or not. If one knows what one's priorities are, in terms of SQ, then reviews can be helpful as a starting point.  I never claimed others' opinions were a magic bullet. I would've thought that was self-evident!  

Unless, of course, you've discovered a purely objective means of determining how a given cable will sound in my system, in my room, to my ears/brain. . . 
Guys,

Just like @ Lalitk recommended; you would be hard pressed to find a better sounding/constructed PC compared to the Zavfino Majestic MKII at its ridiculous low asking price and ALL OCC Copper... You could not even build a DIY PC with ALL OCC Copper at that price and the Zavfino sports some fantastic technologies built into their cables.

Wig