sharktopus
100+ Head-Fier
If I understand you correctly, you are referring to section of cable between the Y and the connectors. It depends on how flexible you want that part to be. I have one cable where the builder (not me) used heat shrink. It's quite stiff, but totally usable. (Yea, yea, that's what she said . I prefer that part of cable more flexible, so I use multifiliment techflex or paracord. I know 95 lb paracord is too thin, and I just cannot recall which size is best. I think 1/4" techflex is what I used. I also experimented with latex tubing in order to reduce cable noise. It works, but the latex fades, so cosmetics becomes a minor issue.
Hope this helps.
Yes, this is what I was referring to. Have you had any issues with microphonics with the techflex?