I wonder if all these people who say cables make no difference have tried to prove themselves wrong? I always believed cables made no audible difference and believed everyone else. Then I tried it out for myself to know for sure. I can't tell any difference with speaker cable really ( haven't done any A/B comparisons), but with headphone recables it's fairly easy.
I bet if you took 10 KSC75's and recabled them with Belden, Mogami, Canare etc you'd have to be deaf not to tell the difference. Of course some headphones seem to benefit less from recables than other. I don't believe $200+ cables are worth it, since I've almost never had a cable make more than a 5% improvement in sound. I think sometimes it takes a good DAC and hearing to figure out the differences. It took me a good 3 weeks to really pick apart the difference between my stock Q701 cable and an ALO SXC cable I had made.
I don't know why cables change my sound on a headphone so much. I think it's pretty common knowledge that a higher capacitance wire will sound warmer and a lower one will be brighter. Of course most say this won't matter with a headphone cable length. You can go to any forum and always see people complaining about Canare rolling off their highs. I've had the same experience.
I've had recables actually ruin what I love about a headphone. You can recable an HD-650 with Canare and make it into a muffled mess. Take a Belden 1192A cable and recable an HD-598 with it. It suddenly becomes much too bright and fatiguing. Why? I have no idea, but it did. I spent weeks trying to deal with it.
I'm not a believer of $200+ cables. I don't think they could ever be worth that. Maybe people love to spout out this Snake Oil garbage because all the pre-built cables are so expensive? I believe in making nice DIY cables for cheap. It's a fun hobby and doesn't cost much at all. I can easily recable my HD-598 for less than $10. Totally worth every penny.
With the correct wire I can retain the stock HD-598 signature, but improve the detail, sound clarity and soundstage (I know you'll love that one). Most of the benefits would not show up in graphs.
I'm also one of those who have found that cheaper wire often sounds better. I'm a big fan of the Monoprice interconnects. They're slightly warm and sound good. I have a whole collection of cables I made for dirt cheap and it took a new DAC to tell the difference between any of them. Strangely enough the most neutral cable I have is the tiny 3.55mm to RCA cable I made from some scrap silver plated copper. I like to use it with my HD-598. With interconnect cables I think there is maybe a 3% difference. I did have one strange experience where my Belden 1192A interconnect killed the sound signature of a SRH-940. That was just plain weird.
For those that want a fun experiment, buy a KSC75 for $15 and recable it with Mogami and tell me if you hear a difference. You'll be surprised how good it sounds just with a cheap recable. So glad I've learned how to use a soldering iron and make myself cables.
Also one more thing..what's really funny is taking an HD-650 cable and recabling a fairly bright headphone with it. The results are fairly amusing to say the least. I think a part of the Senneiser HD-650's sound is due to the cable. Yes, I said it. I think Sennheiser has a very good reason behind their use of specific cables.
Biggest difference I ever heard with a recable was when I attached a new cable to my HD-598 and removed all it's insides. It was enough to push it up past my K601 as a favorite. When I recabled my DJ100 there was little improvement. I also think there is less benefit to a Q701 recable than say using a new HD-650 cable.
IMO most stock cables are good, but many are garbage so I remove them. I'd say that an amp/dac upgrade is a much better investment than a $200+ cable. With that money saved you could invest in some cheap Belden wire $1.25/foot) and a soldering iron
BTW I think I actually like my Belden $25 Q701 cable more than the ALO SXC (silver plated copper) one. Is it better? Nope, just different and all due to preference. Silver plated copper seems to be much less warm than the regular old copper. It's nice having a choice of two different cables.