Cost effective power cables recommendations, low and high power

My first power cord upgrade was a Waudio cable that I picked up on Amazon for under $50.  It made a nice improvement on my Pathos Classic One Mkiii.  It didn't seem to do anything for my Maverick Audio TubeMagic D2 DAC, and actually seemed to do bad things to my SACD player.  I ended up getting a longer one for the amplifier to help with routing (it's not super flexible) and moved the other two to the power conditioner and my home theater receiver.  I picked up a used Pangea AC-XL14 for the DAC and can't say that I heard anything different.

For reference, I did hear a difference with I upgraded the op amps in the DAC and also with a recent tube roll, so it's proven that some things will result in audible changes, but it seems that power cords (at least at my level) are not one of them for me.

When Pangea first came out, I bought a few of their cords as they were supposedly half price from AA. After putting them in my system, the loss of dynamics was very obvious.  I sent them back and went with all Shunyata power cords which have stayed in my system ever since.  

@ghdprentice

You asked about my system. Presently I have Epos M22 (their top of the line floor stander from their heyday, had these forever and in my room they just work for me) and a Rel Storm 3 sub.

http://www.hifi-review.com/152915-epos-m22i.html

Amplifier is Naim Super Nait 2 with their flat cap and superline phono stage.  I moved away from tubes several years back, had Music Reference amp for many years.  Turntable is a Rega Planar 6 with Ania. Streamer is Innuos Zen Mini feeding a Schiit Gungir multibit. This digital set up was a recent acquisition, much improved over my Node 2i I had before that.

Cullen Cables have worked for me and I never have paid more than $130 for any of the several that I am using in three systems.

Also, +1 on the somewhat misleadingly named Counterfeit Chinese Cables thread. There are some Chinese non-counterfeit cables discussed there. I haven’t yet tried any of the power cables mentioned in that thread, but, after reading the thread, I did buy a Chinese Viborg XLR set for $80 that is impressing the hell out of me. Today, someone has posted in that thread that he bought a Chinese power cord at Amazon for about $40 and that he likes it better than the $500 cord it replaces. It’s a gamble, to be sure, but there are so many gambles in audio today, aren’t there? I have no particular use for a power cord right now, but, for $40, it’s a chance that I easily can justify taking.

AudioQuest NRG-4 from Power amp to AC outlet. Most noticeable improvement compared to other components.

The following have been used on different sources CDP, Streamers, Preamps. Can’t confirm noticeable improvements but just didn’t want to leave anything on the table for a minimal investment per component. I am a firm believer in the sum of all parts.

AudioQuest NRG-Y2 2-Pole C7

Shunyata Venom 3

Shunyata Venom V14

Audience Forte F3

Cardas Iridium

All are well made power cables with reasonable flexibility and under $200 available on Music Direct, The Cable Company, etc.