Because this kind of activity drives me nuts. I find it pointless. I don't care one whit about 2431's or waveguides. I want to see more of what people like John can turn out.Your assessment of the 435Al is the general consensus. I forgot, are yours aquaplased? G.T. had to aquaplas them for use in the Array. I personally think the 435Be is better than slightly.People at JBL really like them. They certainly are a big step above the old ring radiators and domes.It really is a fantastic piece of hardware.