New Tech?

let me try my hand at this...

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does it look anything like that??..lol..i doubt it..

well more like this

Heck i can't draw but
Edit: that didn;t work.

--speaker-----port--
---tube-------tube--
---tube-------tube--
---tube-------tube--
----tube-----tube---
-----tubetubetub----
------tubetubet-----
--------------------

where the speaker, did the guy say if he had it mounted backwards where the cone of the speaker is facing the tube, i think this would give you more rumble b/c you would get all the back sound waves off the back of the sub and then the front air waves would travel and give it almost a echo or reverb effect

he just had it in there the regular way, although the reverse mount sounds interesting.
I wander if you would have to use a free air sub or if any regular one would work?

hhmmm....correct me if im wrong....but that design is kindah like a folded horn design although there is no chamber at the end where the sub is mounted.......and one more thing..... 175db's is a little too out of it dont u think??...is that the max spl or is that just at 1w/1m...ive never been to a car db drag where a car would reach 175db, and they have at least 8 15inch subs thumping real hard...and i mean HARD!!!...

Bose put a 12 speaker in a 12' tube only they mounted it in 1/3 of the way It's based on their dual band pass technology. Thing went down to 22 or 24 hz. extremly loud. Regarding the enclosure your describing. It has been done before, but to hit 175 DB it would have to be an extrtemely narrow band width, while loud it wouldn't be very musical.

Right, I don't know how they got it that loud, but it would but out the most god awful quake I can ever remember. Just absolutely shake you apart.
the thing i like was it was just one 12". So I was conseidering a calmed down version of the design with a single 18. I wouldn;t nearly be powering it as hard as they were so I figured it might work good as far as projecting bass.

I didn't get all the details but the guy said he was cranking out 200volts at the speaker. He had 6 batteries, and an amp that was 6" tall, 2'wide and about 20" front to back. Absolutely huge wiring and the whole nine yards. Waaaayyy to over the top to sound good, but it'd hit.

So you thin it'd work well for a calmed down 18?

The other thing is the enclosure of a car is MUCH smaller than a dance floor