Hi Danny Richie..thanks for your reply. I will follow your proposals.
You are together with Mark L. Schifter the absolute top. I am regulary eating all the stuff at AV123 & gr-research. I might have bought the LS9 if I did not like to make the speakers my self; they seems just to be great.I have an ide - that I do not need to use. IF I wanted 16 trebles and are only using 8 mid-woofers then the wooferline would be only 1,3 meter high. The NEO3 is 89mm. tall but the C-C fitting /mounting distance at the unit is only 78mm. So in a "\\\\"-assembly upon each other where each unit is pointing 2-3 deg. upwards all 16 units can be at 15*78 + 89 = 1,259m.
Question: Would that be an acceptable way to build the speaker?