Power cable education needed

The info at this link might be helpful. Other than replacing one to correct "inadequate" gauge, I thought power cords making an audible difference was silliness...that is, until I heard an unmistakable improvement switching from a Pangea AC-9 (7awg?) to a Shunyata Venom HC on a Class D amp. The "flat earthers" can rant all they want, I don’t care about convincing them. Decide for yourself. I like Shunyata. There are other options. Rent something (or some things) from The Cable Co. and try on power conditioner (a bigger impact than on the amp), or amp, pre, source, etc.. Experiment. Let your ears decide. Does a system have to be at a certain level of "refinement" for power cords to make a noticeable difference? Maybe. But I can only speak about my experience with my system which, on the continuum of audiophile gear, is mid-fi at best.

https://www.gcaudio.com/tips-tricks/why-power-cables-make-a-difference/

@mitch2 ,

Thank you for the room comment. I hope I’ve made it sound about as good as it can. Maybe one day I’ll have a dedicated space. I’ll check the cables on the main components to see if an upgrade would make sense. I do have a sub panel in the basement that is used only for the system if that is what you meant by dedicated power lines. 
@ghosthouse ,

I have been reading a lot of good things about the Shunyata products so I think I will try one out on the power conditioner and go from there. I will check out the link now. Thank you 

@ronboco - The dedicated subpanel is a great way to power your audio.  The recommendation of trying cables from Cable Co. by @ghosthouse is good too since everyone ultimately ends up deciding for themselves how far down the cable road to travel.

Companies don't include power cables because: specialization.

It really is that simple. 

If you are using freebie rubber power cords then everything out there is such a big step up you cannot possibly go wrong. If you want better then buying a power cord is no different than any other component. Read the reviews, buy the one within your budget that sounds the best. Once again yes it really is that simple.

The hardest part will be to realize that not only is buying one the same as any other component, but the quality of the power cord matters just as much as the quality of the amp. 

@millercarbon,

Thank you for the advice. I’ve been reading good things about the Shunyata products along with their recommendation by ghosthouse above so I’m going to start there. Also Synergystic Research is on my list as well to check out.