Excerpts from Julien Claassen's message of 2011-06-16 22:21:43 +0200:
Hello Philipp!
I suppose with 60 degrees you mean the two times 30 degrees, that the
speakers should have. I always thought it had very trigonometrical reasons. So
at your head you have an angle of 120 degrees, which is a wide angle, that
might fit the ears nicely, since they don't look like they would make a 90
degrees angle at your point of the triangle. Something in the back of my mind
tells me phases came in as well. But unfortunately I have nothing more
definite. Someone will though. Fons should, since I think he once explained it
to me with perfect reasoning. So should a few others.
Sorry, I couldn't be more specific.
Warm regards
Julien
Thanks for your response Julien,
yes, I mean the two times 30 degrees in front of you.
I hope to get a reasonably scientific answer (if it exists).
Regards,
Philipp