Quote:
| The concept is a bit flawed anyway since the notch filter does only work properly |
The more you´re writing about it, the more you´re telling us you don´t have the slightest idea of what you´re doing (and talking about).
Just because it doesn´t work
properly doesn´t mean it´s not working at all. In fact, the notch will alter the frequency all the time, at any angle, of course.
Fact is: before the other guys told you,you didn´t even know what the circuit´s purpose was. You couldnt do worse if you were trying to find out what difference your new cable made. How would you tell which component changed which parameter? Ridiculous, even from a "subjectionists" view.
And based on that experience, your trying to talk people into buying ridicoulusly overpriced cables. That´s a shame, man.
As some kind of coronation to the whole procedure of butchering the maybe best phone known to mankind, you recognised "it was getting louder". So much for reliability of human hearing. Boost 3000Hertz, and the "experienced audiophile" (and maybe everybody else too) will perceive it as "man, this is some kinda louder".
Thank you for telling us about your profound knowledge.
To be back on topic: Articles like the above mentioned do make much more sense than many posts to be read at internet message boards in my eyes. There should be more of them.

Good luck then.