Inexpensive speaker cables: any experience?

As @johnk has pointed out , Supra are pretty good cables for the $

Inexpensive is relative.

I have auditioned and noticed impacts of speaker cables, interconnects and power cables.  

I have Kimber Kables speakers and interconnects and have traded up interconnects in the past.  It may be worth calling them if you are interested in trying another Kimber product. 

Using 52 yards of Neotech Solid Core UP-OCC in PVC. Turned in to 6.5 feet pairs of speaker cables. For $119.06 delivered/including tax and shipping/I'm impressed.

Bested my: KS6063 (what this Neotech creation was modeled after/less the stranded) and my Fidelium's.

Well, not bested. I put my stranded Duelund with the solid core Neotech and it comes close to my my KS6063. However, if you want a taste of how it gets out of the way......it's fun with the Neotech and Duelund. However, my KS6063 wins up top and timbre. 

I like Paul Speltz's Anti Cable stuff. It doesn't work on every configuration but I've had good results here and there over the years. Cables make an obvious difference but it's system dependent and more money doesn't always buy better performance. I'd recommend somewhere like https://www.usedcable.com where you can try different cables at different price points. And this on why cables make a difference if you want to know more.