I used to know a guy from back when I was going to Phish shows who was an audio engineer and showed me this website along time ago and was going to build the imperial folded horn cabinet. I lost touch with him and never heard if he got it done or how it sounded. THe claims on the imperial page sound untrue but he did not seem to think so and said it is all in the design and how the sound is moved in the cabinet. He worked for McIntosh doing something, I cannot recall what though. He knew his stuff at least with respect to mastering phish shows so much that the band own archivist was giving him previously untouched DATS from the early 90s to master for release on bt.etree.org (legal tracker). What is those of you who know your stuff take on Decware's stuff and have anyone purchased anything from them. You can even buy the plans for the cabinets which I think is pretty cool.
http://www.decware.com/newsite/mainmenu.htm
He was looking at this design.
http://www.decware.com/newsite/mainm....htm&intro
"On one occasion a club owner wanted to hear what one would do in his own place so he called us up. On the spur of the moment we had to take what we had so we packed up a single Imperial, my frequency generator, and an old Harmon Kardon Reciever with one channel blown. Just before we got this call, we had been experiementing with a unique driver arangement. We removed the 15 inch woofer, and replaced it with a 12 inch woofer that was already mounted in a 1 cubic foot sealed cube. The response of the woofer in the cube was 3 dB down at 120 cycles. Basically ZERO bass. We installed this cube into the Imperial with the woofer facing the back of the encosure. The original 15 inch speaker opening was sealed. Installed the response was a bit different. Starting at the same 120 cycles and measuring the SPL at 90 dB in the room we slowly started to sweep the frequencies down until at 28.5 cycles the SPL had risen to 118 dB. That's a 28 dB of gain at 28.5 cycles! I really can't begin to describe what happens at that frequency when you hit that SPL, but it's serious. We saw a mouse stagger out of a crack in the concrete floor and die."