Can a better power cable make a difference if NOT plugged directly into an outlet?

My biggest concern with power cables is that they be shielded due to all the digital stuff I have running around my rack. In this case, yes, a shielded cable after the conditioner can ensure the power stays clean after it leaves.

My Furman filters down to around 3 kHz due to series mode filtering. After power leaves it can be polluted again by HDMI, Ethernet, Wifi, etc.

So, I invest in shielding but not brands.  That is, I will make my own shielded power cables, but I won't invest hundreds of dollars from an audiophile brand.  Shielded power cables can be had inexpensively.

@erik_squires Thanks -- that makes a lot of sense. Saving money by attacking the problem with the greatest impact (if it works) breaks the stranglehold of marketing pseudo-scientific doublespeak.

@gladmo

+1 great post. I agree.

Also, I think you can find much better cords than you are using. I only tried one of the Pangea but it was not very effective, so I never tried more.

Certainly one can try experimenting with material for isolation. But reputable companies have done this for you with every aspect of the cord. The current Storm line do AudioQuest is an example of this. The fittings are so tight I have to hold my mono blocks when plugging in. The improvement in sound from my amps was simply stunning.

I also recommend changing one cord at a time. Experiment with the amp cords first. While every component gets an improvement, the amp is likely the biggest difference and most obvious in the change you can expect for a power cord.

Even if you think you would never spend as much as an Audio Quest Hurricane, I recommend you try one. It will set the bar for what a high quality power cord can do. Definitely plug the amps directly into the direct lines.

OP:

Here is what I use.  Just remember to connect the thin shield wire and the ground at the wall end, but only the green wire at the equipment side.  This lets noise drain to the wall and not your gear.

https://www.partsconnexion.com/DHLABS-75520.html

Don't forget to upgrade the cable from your box to the transformer on the pole too.