maybe not flat but on the section of an arc based on , from the hip, a circle or sphere of 2 ft. (or bigger?) radius for slightly enhanced dispersion
but not the 30, 45+ degrees seen in dipoles, as monopole seems to be the order of the day for "tops", hence the "slightly"
like the opposite , mol, of a synergy horn
somebody capable of using cadcam or the like might find a range of that slight curvature, even just starting with the illustration provided
there was much debate about the 90 degree total dispersion issue for overheads in another thread, the design competition
a question from me provably unqualified to even ask , but anyway
would there be comb filtering/interference issues with just being flat? and there are probably others, I know nothing . . .
I have to think back to questions/discussions/answers about line arrays , some here , some at BF, his short line arrays, and other sites
for me its like the words are "dots" I've heard - but connecting the "dots" coherently, not me . . .
oh yeah, that's why I like AVS
hope those folks speak up as to why or why not