My First DIY Power Cable

Not sure what would be the appeal of Beryllium Copper as an audio connector/conductor.  That copper alloy is usually spec’ed when hardness, strength, and corrosion resistance is needed. I had a set of Beryllium Copper golf clubs (irons) once.  However, wrt conductivity, Beryllium Copper is less than 50 percent IACS.
I find it interesting that some claim to hear differences between oxygen free copper wire at about 100 percent IACS and OCC copper wire at about 101percent IACS, and yet have no issues using connectors that have nowhere near the conductivity of any type of copper - I chalk it up to either weird audiophile lore or, maybe an indicator that this stuff doesn’t make as big a difference as we would like to believe.

@mitch2 ding… I think you win the prize with your last sentence!! Are there variations in materials, use, signature etc? Sure. But, everyone thinks their opinion is the best. To their ears, probably is. It doesn’t really matter, it’s all a big pissing match anyway. Regardless of the connector type, materials used etc, if it sounds good to the person listening it’s all good. I do believe pure copper to be the basic go to when it comes to cabling, particularly power. It is tried and true, and the Furutech copper connectors are great for starter DIY. Wire? Same thing. Pure copper. Gets one in the game, is generally easy to work with and produces a really nice cable if done properly. Getting into the esoterics of plating etc. is a matter of preference, not necessity to be explored as knowledge and experimentation develop.

Recently bought one of these, Oyaide's latest cable. Check out the specs. Oyaide plugs are used by Tara Labs amongst others. A great front end cable.

https://www.audiohobby.eu/et/power-cable/15480-oyaide-schuko-power-cord-18m-vondita-xe.html

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.