@audio_phool - The speaker cables I and many others have built use 2 x 16 gauge solid UP-OCC copper wire (or 2 x 14 gauge) for the signal and 1 x 10 gauge Silver plated stranded Mil-Spec wire for the Neutral wire and they sound excellent
Here’s a link for DIYer’s on how to make them
And here’s what other Audiogon members think of them
https://forum.audiogon.com/discussions/duelund-conversion-to-diy-helix-geometry-cabling
If you have and questions just post them on the thread above
Regards - Steve