Maybe this question is about tastes but I know here are many people that have tried a Bottlehead Crack with HD600.
I believe that when you use cheap equipment, good cables won't do any noticeable difference in what you hear. Maybe I'm wrong. But I believe that if you have a decent amp, decent headphones/speakers and decent source, cables would not exactly improve sound, but let you hear of what the system is capable benefiting some frequencies more than others, resulting in a final sound signature and taste as well as better performance of the overall chain in the system.
I've being enjoying my Bottlehead Crack with Speedball tons paired to a Sennheiser HD600. My source is redbook FLAC files through an iBasso D12 DAC. I'm using a Monster cable, which I think it's still a standard cable suitable enough for a standard DAC. At the headphones I'm using an HD650 stock cable.
I've started to feel that my music is shallow, maybe too smooth than I would like, bass is "poor", not really if you compare to cheaper equipment. My music still sound gorgeous, but I'm starting to feel I need more, I wan't more definition, less veiled sound, more slam on the bass without making it bloat. So I thought, is time to upgrade my DAC as well as my cables, the cables should allow me to hear the better DAC. I already set an order on a newer DAC, I was aiming on a DAC at $1000 or more but I retracted and went on a cheaper Bifrost, should be enough for now.
I know that maybe I should have simply went the path to change headphones instead of a DAC, but I'm not willing to spend on a newer amp as I thought: if I want to upgrade headphones, it should be the Audeze LCD2, oh well, maybe at the end of the year I would be looking for that. I don't really want a total change in sound signature now so crisper headphones is not an option now.
Any comments, correction / opinions on my thoughts are welcome. If you can suggest me cables that are going to make me happy and get the result I'm expecting please throw the line. Thank you!
Note: My experience on amps, dacs and headphones is limitted to the combo I mentioned. I also don't have any chances to test equipment on stores nor with other people, so this is why I research the most I can.