Cables for Devialet D200

[El_Duderino]

A scientific attitude is : there is no study showing difference between cable, then i can't afirm there is a difference or not. There is no proof in a way or In another.
Then, if you haven't any study, how can you say :
"There are no instances of people being able to distinguish between different power cables in blind tests. That tells you everything you need to know. "
Well interesting subject

I am very sorry but I believe that is inaccurate.  The scientific argument is to accept the null hypothesis in all study design.  

So, for example, the null hypothesis in a (simple) double blind randomized controlled trial of speaker cables would be:

"There is no difference in audio quality between speaker cable A and speaker cable B."

The alternative hypothesis would be:

"There is a difference between speaker cable A and speaker cable B."

The scientific burden of proof is on proving the alternative hypothesis because, until that is done, the null hypothesis is assumed to be correct.  If you cannot prove that the participants in the study are able to definitively identify one cable is superior to the other with a p value of less than 0.05 (ie less than a 5% probability that the observed result was due to chance), then you MUST accept the null hypothesis.  You don't conclude that you can't tell if it's better or not, you conclude that there is NO difference until proven otherwise.  This is basic scientific study methodology.

Similarly, if there is no study showing a difference between cables as you say, then the scientific "presumption" is that there is no difference.  This can only be refuted through testing demonstrating that there is, in fact, a difference.