Speaker wire... Diy?

Just get some Duelund 12ga

Talk about overpriced low tech. Little different than THHN 12ga @ 50¢/m.
It may sound a little different, but unlikely better.

Always wanted to try these.

 https://diyaudioprojects.com/Power/Low-Inductance-DIY-Speaker-Cables/

Ieales is right. Just plain right.

Take, for example, my ESL speakers. They come with a resistor in series with the cable to tune the transformer. So, you might ask, why bother with an ultra-low resistance cable? Answer: you shouldn't. You should lose that resistor and engineer the cables to have the required resistance (and other properties). Good luck with getting that off-the-shelf, but you'll find lots of people who have firm opinions on the 'best' cables for all speaker/amplifier combinations.

As for starting with something good, why? By which criteria are they good? I say start with lamp cord, and make every upgrade prove itself in your system. But if you must spend money for whatever reason, try Goertz cables - they are most nearly neutral (by Maxwell's Equations - but then who cares about the science), and can best withstand long runs.

Had em all Terry9....Goertz as well (not good).  I don’t rely on my inner dialogue or misappropriated technical analysis.  I’ve got 40 years of owning many 5 and 6 figure systems and dozens of cable designs.  Cheap don’t do it.  Many expensive cables fail horribly.  Some rise far above the fray because they are manufactured by music lovers, by people who listen carefully while developing their products.  They don’t falsely believe in theory without testing it’s application.  I speak from experience to the exceptional!  Then again, ignorance can be bliss for some.  A little knowledge and a lack of experience will always prove whatever you want.  Enjoy 😉