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
“Cables that are much better cost way over 5k and you will notice the difference immediately”

@begow,
I respectfully disagree with above statement. There are plenty of professionally made high quality power cords to choose from that can sound incredibly good under $1K. As with any aftermarket cable, the degree of improvement one hears is system dependent.
I’m using Audio Quest monsoon. Also running a Niagara 1200 power condition. Also running balanced inputs. No ground loops no noise.😎
As for which cable to replace first, buy one cable and move it around. See which component improves most. Buy a second cable and repeat.
Get power cords that are made with OCC single crystal wire you'll be amazed at how much better things will sound and do everything.
@lalitk 

I agree that there are probably good cables under 1k from many manufacturers. And that is precisely my point. DIY is not going to achieve those levels of sound quality easily.

I disagree that good power cable is system dependent. If the power cable is system dependent then it has been designed to do something well and if you have the system that doesn't do that particular thing well you have a match. Otherwise you don't. The power cable doesn't make the music it allows the components to shine.