with Circlomanens idea I also built a 5 1/4 WO The sub has reinforced sealed chambers with dacron fill as well as a small amount of dacron in the first fold of the horn. speakers fire into the sealed chamber mounted in the first fold. built with 5/6,1/2, 3/4 plywood scraps and two 1/4 inch hardboard panels.( thats why the reinforced sealed chamber) measures 24 x 24 x 6.5 and does not have Circlomanens horn design right now.
I have a ads power plate sub in my car, it is only two 6.5 subs as an infinite baffle. it plays amazingly low. the woofers I used are old coustics that I pulled out of the front doors because they did'nt have enough jam and I upgraded.
I put the scaled WO in, same amp setting and crossover. Crossed at 80 hz
results were:
- takes a whole lot more power without distorting ( I mean a whole lot)
- mid bass heavy but pretty smooth for the hz.
-Not anywhere as pleasant as my ADS or as low but with enough  watts, more than my ADS can take it rattles everything that never rattled or resonated before.
-Freaking loud with so little power compared to my ADS sub
- i think it does play reasonably low but can only do it at a level cannot be tolerated in the car. I put my hearing protectors on and cranked it and it can really kick. rattles me and the car.
never needed that much power because the car is so quiet and insulated.
- I am amazed that speakers that hardly put out any sound volume are so loud in the WO with so little power
-BOTTOM Line is:
- very loud for the amount of power put into it and speakers take more power than they ever could before when in the WO
-I Don't like the way it sounds, not low enough and not as smooth as my little ADS plate sub
-I would not use it in a car, has to be to loud to kick you in the seat of the pants
- It will be used as a pc sub or a patio sub and could try crossing it over lower maybe at a later date.

still slapped together but it will be a while before I will polish it up so here are three pics

Pictures removed

[quote author=DirtDawg  link=1123627943/0#5 date=1123640421]COOL gex!

Also do you remember what I did to the port area on mine?  I doubled the panel that creates the port and the first flare. This will lenghthen the port, take some space inside that chamber, and stop any vibration in that area. That alone seemed to lower the WO's voice a lot.

I've read several times - "mess with the design and you're on your own"
While that may be true there are many of us who can't do it but we still want to watch so keep us posted.
[/quote]

Hmm have to consider that port adjustment, and the crossover point but the lowest I can go is 60hz.
Mess with the design? well I run with what I brung. At present most of the stuff is out of parts laying around. The long term goal is a nice set of speakers and a nasty low sub that'll put cracks in the plaster without sounding loud at all.
But who knows when that will happen so I may as well play for now  :)

How wide is the throat ?
If the throat is to wide it will play a lot more midbass and not any real deep stuff.
First time I tried mine it had 1,5 inch wide throat. Id did not play anything below 60 hz. Once i made it smaller, 4/5 inch, it did hit 35 hz and sounded way better.

[quote author=gexter  link=1123627943/0#0 date=1123624343] with Circlomanens idea I also built a 5 1/4 WO The sub has reinforced sealed chambers with dacron fill as well as a small amount of dacron in the first fold of the horn. speakers fire into the sealed chamber mounted in the first fold. built with 5/6,1/2, 3/4 plywood scraps and two 1/4 inch hardboard panels.( thats why the reinforced sealed chamber) measures 24 x 24 x 6.5 and does not have Circlomanens horn design right now.
I have a ads power plate sub in my car, it is only two 6.5 subs as an infinite baffle. it plays amazingly low. the woofers I used are old coustics that I pulled out of the front doors because they did'nt have enough jam and I upgraded.
I put the scaled WO in, same amp setting and crossover. Crossed at 80 hz
results were:
- takes a whole lot more power without distorting ( I mean a whole lot)
- mid bass heavy but pretty smooth for the hz.
-Not anywhere as pleasant as my ADS or as low but with enough  watts, more than my ADS can take it rattles everything that never rattled or resonated before.
-Freaking loud with so little power compared to my ADS sub
- i think it does play reasonably low but can only do it at a level cannot be tolerated in the car. I put my hearing protectors on and cranked it and it can really kick. rattles me and the car.
never needed that much power because the car is so quiet and insulated.
- I am amazed that speakers that hardly put out any sound volume are so loud in the WO with so little power
-BOTTOM Line is:
- very loud for the amount of power put into it and speakers take more power than they ever could before when in the WO
-I Don't like the way it sounds, not low enough and not as smooth as my little ADS plate sub
-I would not use it in a car, has to be to loud to kick you in the seat of the pants
- It will be used as a pc sub or a patio sub and could try crossing it over lower maybe at a later date. [/quote]

did you try it faceing backwards? or any other orientations? my wo32 sounds like nothing till i get it positioned right-then it sounds like everything?

Update on the little sub Wo
 
rough edtion One before I made changes

http://tinypic.com/awvvcj.jpg

rough 2 with the flare not completely done but you get the idea

http://tinypic.com/awvx1y.jpg
this pic is of it not quite done.
this one the flare was added and completed and the throat was narrowed. some more damping was added.
the result was a lower sound and not as annoying and the thin top and bottom are a no no. they create substantial resonance, I have no Idea why I thought I was going to get away with it or what I was thinking.
I went and got a cheap MA crossover and took it down to 45 Hz and turned the ( Whoo so cool ) [bass boost on].
It made a huge differance with the lower crossover point.
I think I am going to narrow the throat more and remove some of the damping that was added in the chamber before the horn.
I will keep playing with it to see what works and what does not over the next couple months.
thanks for all the ideas most of them have been tried and tested  the box is getting really ugly but nothing glue and a air nailer can't fix.

Still stuck on the Imperial SO and have that pretty much figured out, But I still want the plans to be sure.

likely I will build a 8" WO before I build the Imperial SO because I already have the stuff for it. kinda wish I had the money for Steves 10" to build it the ideal way, But thats life.

.........mmmmmmmmmmmmm, what would I have gexter do?  

Hey gex if your taking requests, I've got one for you.

Cut 4 boards the inside height of your cab. Two of them 2" or 3" and two the same as the port/throat panel. Place them inside the ported chamber a distance equal to the first of your flare away from the port panel, try the 3" boards first and if that stops bad things, try the full size ones and trim if needed.

My thinking is that the box is still tuned too high and anything you can do to choke down the port a little without destroying the smoothness would be beneficial. I hope that makes sense without another drawing.

To be honest Braggi I have done next to nothing besides my version of a SO. I am waiting on my WO32 plans and stopped experimenting because it was getting on my wifes nerves.
the Little WO is still in use and the throat was choked down and dacron was removed from the throat as well.
When I first built it put out incredible volume with so little wattage.
I had to drop my crossover down to 80 then to 60 in my car. The volume dropped but the sound improved considerably.
when I placed it in my trailer I removed the top and flipped it upside down and directed it towards the back of the trailer for my son to use. It won me some major brownie points and amazed hie friends. ( keep in mind these are 14 to 19 year old kids)

I was used so much I could not get my hands on it to play with it. it has a flare that starts at the driver exit port to the first bend just inside the mouth.
the midbass boom is a real problem with the small versions.
I do have to say overall I was surprized at the results even though it was midbass heavy. I had to do it to find out how flexible the design was.
If I was to do it again I would go 24 X36 if possible match the sealed area to the driver sealed specs. without making the Q to high.
I would make another without hesitation but lean more to Steves original design.
I am unsure of the flare because I was not able to test it after I added it. I think you are able to control expansion rate more acurately. It may also add more area making it a fraction more of a horn.
I have a 8" one in the wings and it will be the full 36 X 36
and will have a flare. and the sealed area will match the woofers specs.
the WO is kinder to smallish speakers more than the other designs I believe.
Sorry I could not be much help

good idea Adrian
Presently a crossover and location is doing an ok job for my Son and still impressing his friends.
Myself, I could not put up with it.
I may modify the vented chamber because all its just a chamber that vents like a port.
I will not be bothering with it anymore.