I'm with you on cable. I do see a difference, sometime, but it is usually very subtle.
You need a very well tuned system to see a different: decent gear (source, pre-amp, amp, speaker), decent room, and very well position speaker in order to get a good sound stage. Without a good sound stage there's not much difference to be noted.
I was using Transparent MusicWave. I changed for GR Research 24 strands speaker cable. I saw a small improvement: a bit more definition between instruments. I guess I could say a more defined sound stage. But it was minimal. But I really like the idea to building these cables. That was fun (lots of work but fun).
As a reference, my system consist of PS Audio SACD transport, Schitt Gungnir DAC, Simaudio preamp (P5003), F5M amp, speaker XL-S Encore, one GR Research Double Trouble sub. All inter-connect GR Research.
Have fun in your endeavor!
Edited: forgot to mention I'm a old man (60) which can't barely ear anything above 12k Herz...