Romy,
there are box-speaker manufacturers that use exactly this approach, so nothing is so new about it. I think Karma and Evolution Acoustics speaker (also layered construction) come to mind, see below.




As to CNC routering, it needs a CNC cutting program written to produce the numerous layers. This would be a cost amortised over the number of cut. But today's CNC routers should make that a pretty quick task as all be different size circles, yes?
The ONLY thing I can see to be an issue, are the ever changing angles / degrees of each 'slice's' in- and outsides. I would imagine your man would still have to smooth them over on a wood-lathe after all is glued up --- it still would be a lot easier since he has the already existing edges to work from.

How could you figure this out? Even if vertical horn is saving space, the other channels would be so far back that space is a problem again?

No wonder I hate horns. Been avoiding them all my life, but now is the time in my life for Horns.

j.

http://www.ultraaudio.com/twbas/twbas_20050915.htm

http://www.ultraaudio.com/twbas/twbas_20051215.htm

http://www.ultraaudio.com/twbas/twbas_20060215.htm

I do not know if they are relevant as they look like made a room to control problems with their relatively tedious (in my prediction) acoustic system.

http://www.ultraaudio.com/twbas/twbas_20090401.htm

You could bond (either completely or strategically) "hook-end" velcro to the horn and then have some custom sandbags made with "loop-end" velcro on one side.  http://www.uline.com/Product/ProductDetail.aspx?model=S-14556&ref=6426

If I were to have such horns (and in the future it is quite possible) I would be tempted to make them with two walls separated with sand or at least at the full weight.  For mobility/positioning I would mount them on robust castors for floor use.  I would be most tempted to fly them over the other channels, in which case I would love to use a jib crane.  https://www.gorbel.com/Products/Jibcranes/Ibeamjibcranes/wallcantileverjibcrane.aspx  They look quite reasonably priced...so much so that I would probably go for these even if floor positioning was the objective.

Did I ever mention that I am not married?  I guess it's obvious enough.
LBJ

decoud wrote:

I thought of filling with sand braided multifilament nylon cable sleeving (http://cableorganizer.com/nylon-multifilament/) which comes in 2 inch diameter and does not expand enough to allow coarse sand to come out. It can be wrapped around as densely or sparsely as required. The problem is that it offers little structural support, though the tension of the fabric may convert some of the weight into compression. So the underlying structure has to be very rigid, it seems to me.

Once again, there is nothing specific in this post just some further thinking on the subject, as I keep discovering new idea.

A couple weeks back I was looking at a house that gave in inspiration to think about it. The house was 3 bedrooms California Ranch with very nice for my purposes layout of the rooms. The Living Room was around 15x20, so called Family Room was about the same and the dining aria of kitchen was around the same. The have no caring walls between then, at least at my own first inspection, and were positioned in a way the turning de a few not solid walls it would be possible to convert it into a wade open plane and to have my 900 sq feet (preserving the bedrooms). I am not going to proceed with THAT house (because a multitude of reasons) but I just give a conceptual view – you will understand why. The house had marginally acceptable high of ceilings and as most of the Ranches it had a basement.   It was a full basement with a typical appliances room, and a large 35-40x25 empty-space room with low 8 feet-tall ceiling. The floor between Living Room and basement was horrible. I mean it was wonderful from a perspective of normal people but from the perspective of my objectives the floor was crap. I would rather much prefer do not have any basement at all and have a house sitting on a concrete slab (good luck to find it). This suspended, very not-solidly made, almost breathing flooring is the subject of my attention.

Let look at this farther. Installing the playback at the first floor of a ranch with a basement and cheap floor (all of them are cheap – I never seen then to be solid enough) I think I would never have proper bass. (BTW, in my current room I do have a concrete slab as my floor me and the bass I get is very nice in my view). The lower bass will be just passing through the floor like a hot knife through the butter.  However, then I begin to think about the content of bass in my playback.

It will be presumably 40Hz horns but it will not be the lowest bass. The folks who read my site know that I advocate the open-bottom lowest bass channels and in my case it will be 30-40Hz crossed truly LF channels, let call it ULF channel. So, for the ULF channel the light-suspended floor like I described would virtually not existed. If so, then I wonder if it is possible to put the ULF channel… in the basement, letting it from there to supplement sound in the room above. I never thought about this option before I wonder of anyone experimented with it.