THanks a lot, Bob. Great post & very informative.
I thought it would be good to know what the fundamental frequencies are. Linkwitz's orion does 140-1500 Hz (approx) on one driver. I have found that if I do 100-3500 on one driver, itr pretty much covers most of the listneing spectrum...just by my own listening experiments.
Of course the higher one goes, the greater the cone breakup, and beaming. It' a tradeoff! Linkwotz chose to go with no cone breakup. I do a little bit of cone breakup on my vintage trusonics.
-akhilesh