I have posted this before, my stock cable broke on the first few days. HiFiMan offered to send me another one but I declined, instead I asked for more connectors. I figured why would I want more crap when one is one too many.
So I made a new cable myself with stuffs that I have on hand, pretty identical to the one above (same cable and plug). To me the sound difference is obvious, the stock sounded tighter and more analytical, the copper sounded looser and warmer and more fun. I prefer the later. The down side is Canare is much heavier which is bad for the already the weak connector.
I then cut apart the stock cable connector, inside it is actually the identical connector as the ones provided, except without the cup/cover thing that covers up the ground connection (in its place the the plastic molding), I soldered it back, wrapped it up with heat shrink, put it in its original packaging and stow it away
What is crappy is not the cable, but the connector. When the cable is tugged, all the forces are on the electrical connection/soldering, with no means of strain relief. The design is flawed and I don't believe it can be fixed unless they ditch the connector. Simply this is not a headphone which you can yank all you want like those from the big manufacturers.