What is that difference? Where does it come from? That the number, the measurement and the math can’t find it is utterly meaningless in the face of the observation. That it cannot be scientifically found, does not make the observation invalid. It makes the claimant of science being above and ruling over the validity of observations, observations made by what is actually moving into being millions of people (over the years) --at fault. Audiophiles and their friends and families have been exposed to the directionality question--so it's into the millions of people exposed to the quandary. To add, we’ve now got this huge group of headphone fanatics who are spending mucho cash in this area and they are also caught up in the directionality question.
You got me there. I was under the assumption there were only around 200 audiophiles, 250 tops.