I have had kind of a nasty experience with my he400i with a lovely ending. Two weeks after my purchase the cable of the 400i started to loose the left channel depending on the exact position of the cable (which had never left my office at home). I contacted the shop and they passed my issue to HIFIMAN. I got the option to get a better replacement cable from the 500, which is a bit longer (2m) and it has a big plug. When I received the cable l, everything sounded MUCH better!
I think it is mostly due to the fact that I had a faulty cable, not so much due to the new (supposedly better) one, but bass impact is now much stronger than before
Are these cables available at head direct?