I've recently left the HD580 camp to join the HD595.
Used the 580's for about 5 years, powered by a Pioneer at first and a Denon amp later. Great cans, truly love them in every aspect but 1.
I don't know if it's just me on these boards, didn't read the entire thread, but my cable wears out every 10 months or so. It starts with the signal dropping occasionally on 1 side (no specific side), which tends to get worse until eventually the other side starts failing as well. Sometimes it can be 'helped' for a while by tilting my head a certain way... but honestly it was always insanely annoying when 'that time of the year' came again.
I use them at my desk, so their only abuse is putting them on and off, yet somehow the cable will always fail near the plugs(headphone end) around the 10~12 month mark. I buy/bought genuine Sennheiser cables only, but this 25€ a year subscription was starting to annoy me to no end. Alternative cables are generally more expensive and look equally weak near the plugs.
A couple of friends of mine also bought these headphones back in the days and they experience the same problem. I've tried multiple re-enforcing tricks, but to no result.
I've talked to several persons about it, yet none has a solution. Also looked into the HD6x0 cables, but they seem to be the same (apart from the coloring). I haven't had a chance to try the HD6x0 cable in person, so if someone can confirm this as either false or true that would be appreciated
I've got the HD595 for about 6 months now, which sound a bit different. Different, not necessarily better or worse. I don't want to post this as a '580' vs '595' sound-quality message, but the more robust cable on the '595' has given me more peace of mind so far, which definitely helps while listening. I've yet to see if it will outlast the 10~12month lifetime of the '580' cables, I'm simply assuming it will for now, for my own unconcerned and relax listening experience
If not, I'll definitely post about it.
For now, my HD580's are shelved.