My First DIY Power Cable

Furutech is a good start in my opinion. Check out VH Audio for cables and connectors. Another good resource is Sonic Craft for Neotech power cables and connectors. 
I’ve gotten good results with Furutech Rhodium connectors on two Furutech power cords I just put together. Very solid connection on both ends. 
The break in was brutal but other than that nothing to complain about.

I found the Oyaide Tunami v2 power cable to sound good on my power amplifiters. It uses the high polymer polyolefin insulation discussed in the information linked a couple of posts previously for their VONDITA Xe cord. It also uses PCOCC-A wire, copper foil shielding, and a Carbon PE layer. At 5.5 mm squared, it is a bit larger than 10 awg per run so should be sufficient for just about any power amplifier, which is what I used them for.

What I don’t understand, is the polarity between their attention to detail related to the wire conductivity in the power cable but then their use of plug connector blades made from deoxidized Phosphorus Bronze, which has relatively low conductivity in the range of about 11-20 IACS. I made cords from their P-079/C-079 plugs/IECs and Furutech FP-Alpha-3 cable to power my monoblocks and the sound was good but not as dynamic and rich as I hear from my 7awg WE wire cords that use Furutech FI-11 plugs, and also not as good on my amps as the Oyaide Tunami v2 cords that I now use on my preamp. The 7awg WE cords are very similar to the well-regarded 7-Plus American Series from TWL.

@mitch2 You really know about Oyaide power cords. I like them and their plugs along with Furutech.

However in the value stakes I think Oyaide have it. I have an Oyaide R1 wall socket which is Beryllium Copper, the top Furutech is double the price.

Oyaide market their VONDITA Xe cord as a power (amp) type cord but I've found it's extremely detailed. Putting any power cord on my master clock reveals a lot. It was far too detailed (read harsh) for my master clock.

It's since found it's place on my ethernet optical fiber box, on which it does a wonderful job.

The various Helix DIY recipes are great, I've tried various Oyaide, Furutech and Neotech recipes over the years, Helix with VH Audio AIrLock are winners at present.

Another great option for connectors are IeGO IEC's and Edison plugs.  Take a peek: https://alexsoundtech.com/iego/materials-technology

I have found them to sound better than their Furutech or Oyaide counterparts.

Silver is crazy expensive but sound very, very good.  Their gold, silver and rhodium devices use Furukawa copper and offer great performance at a competitive price.