Hmmm. Yes I've done a bit of exploring at your suggestion. I don't see how you manage to do all that you do unless you are a pseudonym for a manufacturer with umpteen employees instead of a simple lone genius billionaire. Perhaps I can do something about an outdoor sub. I do think that my array ideas for the A-7's will shore up their bass response. But it would be nice to go down to 30 hz or so instead of 50. The 16 hz I get in the house would definitely destabilize the shoreline. Maybe when I unload a ton of stuff on ebay I'll have some money to do somemore. I really would like to build my A-7s into two arrays of four with the horns stacked sideways on each other, woofers adjoining-2x2, With wings, that should make a big improvement - and easily driveable with my present equipment. One thing I always find humorous (?): When someone finishes describing something like your 12pi speaker with absolutely unearthly words and measurements, but then adds ..."of course two would be even better".