Funny thread on the Rockford forumn.
http://www.rockfordfosgate.com/forum...23&whichpage=1

I still don't see how the snail shell is any different than a well designed horn-loaded enclosure. Horns have the benefit of being able to basically tune themselves over a broader range than a regular ported box which tunes itself at one frequency. They are also generally many more dB efficient than a ported box. IMO they are more of a horn in nature than a TL but get that Wizard kid to admit that. Impossible.

^It strikes me the same way, as a clever horn loaded system. It's description is not unlike the B&W Nautilus... hopefully it works that well

From what I can gather on the companies website (their forumn) it isn't a TL or Horn Loaded design, it looks like a ported box with a port that doesn't have a constant width. for example the port would seem to have a width of say (I am just making the actual numbers up) 3 inches at the throat and 5 inches at the mouth. It can't be horn loaded if the sub is on the baffle and there is nothing in front of it.

Also if you go to the multimedia section and look at some of them they sure don't seem like much of SQ boxes to me, and they make alot of excuses on why their SPL is lower than the others in the competitions they filmed.

Also the part about "servoing" two subs together is baffling.

Sure it can. A rear-loaded horn has a continuously expanding throat area that starts behind the woofer and extends to the outlet, usually of which is on the same plane as the speaker. A chamber is built behind the woofer, like a typical box, then a small throat lets the frequences out of that chamber to a mouth that is larger in area.

Here are some links:
http://www.speaker-online.de/bauen/naumann/
http://www.atatan.com/~s-ito/sp/makizou.html
These are pretty funky http://www.carfrae.com/pages/frameset.html
http://www.spnet.ne.jp/~hasehiro/

I got lots more. Some really neat stuff out there. My theory is the powered4sound kid came upon one of these little-known designs and capitalized on it. Here ia a great diagram complete with dimensions:
http://www.plasmatweeter.de/images/jericho/horn.gif

[ June 16, 2004, 11:36 AM: Message edited by: SUX 2BU ]

Threads on the "snailshell" remind me of another premade vented design from about 8 years ago that was the be-all and end-all. I can't even remember the company that made them... [img]graemlins/freak.gif[/img]

this one?? http://www.decware.com/whorn.htm

[. It can't be horn loaded if the sub is on the baffle and there is nothing in front of it.

incorrect, you can have folded horns that have the woofer mounted on baffle, with a tuned horn that can wrap around the top, bottom, or sides, check out team shadows dodge shadow, a perfect example of a horn that the woofers are mounted on a baffle and the horn wraps around the side [img]tongue.gif[/img]

The way I see the diagram that Sux posted I don't see a "real" horn, to me a real horn has the driver mounted in the throat and the enclosure flares from there to a mouth.

That box that is posted looks to me like a ported box with a varying port diameter.

Anyways the thing that really got my attention is that two drivers couple to "servo"?

i would define it as a transmision line with the port being that long
its somebody trying to reinvent the wheel
it was posted for a long time on termpro
now i haven't seen any posts on it for a while