In your writeup for 12 & 15 Pi horns you mentioned a conical horn for 15" driver. I've been thinking about this for a while. How large of mouth is required to get down to 100-125 hz range? Can mouth be minimized any when cornered using walls to extend mouth? Could you run up to say a 1.6K xover point with something like a 2226? Considering a folded bass horn up to conical horn, then compression driven horn up top. Thanks for any thoughts, Jerrod

P.S. Finishing drywall in music room now, getting close to kicking off major speaker building projects!