If I wanted to make my own speaker cables, is this a good choice for wire?

For single driver speakers I suggest using solid core copper (one run for +/one run for -).

With cables 12' or less stay in the 22-26 gauge range unless if you want a "less full" (thinner) sound then go 16-20 gauge.

I use 47 Labs OTA (26 gauge solid core copper in a VERY thick polyvinyl insulation) and recently tried Neotech 24 gauge/Teflon.

The Neotech is readily available (by the foot) and inexpensive.

https://www.soniccraft.com/index.php/neotech-wire-teflon-solid-cu-c-296_175_183_221

I've used (mainly) vintage Elac S517 and Stephens Trusonic 80FR single drivers for the past 20 years and realize that saying that heavier gauge wire reduces bass/fullness seems to go against the grain, but this has been my experience with all of the single driver speakers I've used over the years.

DeKay

Mitch2

Yes You are correct about CAT cable. The reason I mentioned it was that My first pair of good sounding cables were DIY from CAT5e cable, 27 pairs braided into one homogenous cable. There wasn't ANY measurable Inductance and the Capacitance only slightly high. Resistance was VERY low. Seldom would you find an AMP that responded negatively to high capacitance. When I first connected then My Volume rose roughly 3db which is huge if you think about it. Covered them with nylon woven covering and gold plated Bananas. I must say, when braiding these you can expect to have a lot of arthritic pain in your hands for a long time afterword. I ran these for roughly 15 years up until I got my first NAD amp and then graduated up to commercial cables.

I will recommend Inakustik wires.

Julian

Yes I made speaker wire using Dueland tin copper for my home office system consisting of TeKton Lore speakers a refurbished vintage Pioneer 5590 receiver inexpensive dac and server . I also use Dueland tin copper for my headphone cable fabulous bang for buck wire ,,..

Duelund DCA12GA bare between Luxman 509X and ATC SCM 20 monitors set on Sound Anchor stands and they are superb.  Solid bass, sweet midrange and very open on the top end.  This is a perfect speaker wire for the money.  Perhaps my Decware Silver Stix are a bit better, but for the money Duelund is tough to beat.  Have fun with your choice.