Thanks for the link. Horns definitely intrigue me. I know they are hard to build and design but the bass just seems superior, the output is so awesome and clean and you don't need a ton of wattage either.
The only problem is I might at some point want to add subs down the road for more, and also more extension. I would hate to paint myself into a corner or be limited in future designs so I would like to know what I am getting into up front.
I have been playing around with hornresp and it's a learning curve to say the least.