Sorry but this is ridiculous. To my knowledge there has never been a single scientific measurement released to back up cable manufacturer's claims of improved sound quality and releasing said measurements would in no way harm their 'research' or reveal any kind of trade secrets.
if you are using a good normal rig to power up you headphones hd600 , then you will conclude this. if cables cannot improves sound, then the giant company like the lossless or cardas company cable will close shop. even the furutech & iso clean company selling high end audio "fuse" also will close shop.This is common sense. The problem is you need a control environment & a high end source to hear this. This could cost more than 2000 pounds easily. I am not bragging , but just to ensure that my set up gives a very life like sound, i have spend a lot. total weight of my entiry rig is easily more than 50 kilogram--even my noise filter is more han 3 kilos .. i am kinda out of the box guy . for true audiophiles, they did not care what type or brand you use, the main thing is that the they wanted the life-like sound. You must be there in the music world when listening to music. when i am listening to "yanni in mandalay bay blue rays" .. at one point Yanni himself almost disbelief when hearing the Sam the violionist hit an incredible notes..you can see yanni is shivering for a moment.. In my rigs, i also felt the same like yanni ( after i further do some more tweaking to my rigs) ..my god it was an unbelievable..this sam is a perfectionist so is yanni
having said all these, try to be open minded when new things thrown to us. do more research. try to listen to more set up.If you could bring the headphones to a recording studio. for your info even gorge cardas was unable to explain why cables touching the flow shows distortion electricity ( through a oscilloscope) ..try to google it in you tube.. i think he is honest
I have been in audio world for almost 20 years..from car audio, home audio to headphone.. I choose headphone to be my last because i know, if i get use to headphone sound so much, then the rigs in my mid end home or car audio would sound mediocore compared to it