I just love all the honkingI never figured you to be a horn guy... What gives?
Seriously. Years back, a friend asked me to help him build good speakers, capable of filling his front room down to 30Hz, but 2-way. I chose the 511 horn with a quad of Peerless 830869 woofers below it in a 10 ft^3 (283 liter) ported cabinet. He does use a sub sometimes now, but the Peerless do a good job nonetheless.
It turned out well, so I decided to make my own horn-based monstrosity. For my system I got fancier and MTMed the horn with a quad of SEAS W18s, crossed to a woofer at the 110Hz baffle step.