Thanks. I'll get started on the crossover for 3 - 4 pi's. Might take awhile for completion of everything but I'm satisfied that I have the best solution going for what I want. It's been a long research journey (DIY designs, QSC horns, JBL, QSC cinema designs, the new MEYER EXP Cinema speakers, PHC, etc.) Always knew it would be a diy build based on one of those but in the end your 4 pi solution is the most logical. Thought for sure it would be an active solution as well but it seems your years of refining the crossover is not a compromise.
Curious if there might be any pi owners up here in Nova Scotia?