There are Two Threads on this and a Link to a Web Site that originated the following of the build design.
This is a Scratch Built Cable, one chooses their bare wire and gauge, insulator, termination, there are many descriptions of what was detected as an End Sound, when a particular permutation for materials are used in a unique system.
As in all cables, systems are not ubiquitous, hence not all discoveries made and reported on will produce identical results.
https://forum.audiogon.com/discussions/diy-helix-geometry-cabling