Re: the photo with the two L1's and 4 B1's: I can't imagine using that kind of arrangement in an enclosed area. I'm surprised that there is glass in those widows. I regularly use the L1 and one B1 for most indoor venues and find the arrangement suitable for even larger indoor venues. Two B1's for Large outdoor venues -for some of the Italian festivals I do, the areas are about football field size and two B1's very adequatly fill the space.
As well, 'all things considered, I'd rather be in Philadelphia' 'er I mean the Phildelphia 'burbs ... (with a Bose... a PA800 ... and a Giulietti midi and a ....
Ciao,
Jerry