When it comes to cables, I am usually a bit skeptical about the sound difference they make. But when I bought the GH50 JM, I also ordered a custom cable with it. I knew the stock cable would not be practical with its 1/4" jack. I also read that it was stiff and microphonic. So I've been using the custom cable without even unwrapping the stock one. But today I decided to compare them.
First of all, the custom cable is soft, flexible, and not microphonic unlike the stiff stock one. The braided sleeving is pretty thick which makes it less portable. But my iBasso DX300 isn't very portable either. But I am fine with a transportable concept. It's also worth noting that my custom cable didn't come with a splitter which I don't care about.
Sound wise, this is where it gets interesting. The custom cable does make a difference in fact. It's just on another level. I've been switching between both cables back and forth, and in my opinion, the sound has much more clarity with the custom cable. It also makes the sound more airy and vivid. After switching back to the stock cable, it becomes obvious how the music sounds cramped and less detailed.
This was an interesting experience. I appreciate the custom cable even more now.
On another note, unfortunately, the Kennerton's 3.5mm connectors are not compatible with my other headphone Denon AH-D9200. And vice versa, the Denon's 3.5mm connectors are not compatible with the GH50.