floor to ceiling horn?

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#22
For my next house. When I retire. The house is already waiting for me, and has a pretty good sized basement dig into a hill. I’m sure there’s something absurd and beautiful that I’ll be able to do with it. I was thinking to build a workshop down there, but maybe a theater would be good.
 
#24
GM said:
A full height room corner is a huge parabolic horn, so the actual horn only needs to be long enough for loading the BW above it.

GM
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Hi, could you provide more tips about how to research about this kind of horns? Thanks!🙂

I've tried googling many times but cannot find a path. Parabolic horn is a new term to look for, but still not too much results how it relates construction of this kind of enclosure to be able to simulate one and judge if it is worth the trouble building. I'd like to find out how this kind of tall / slim horns are constructed and what kind of issues / performance there is comparing to a plain ported box in a corner.
 
#25
Parabolic horn is a new term
Click to expand...

from Dinsdale (WW)

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dave
 

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#27
Parabolic is not really a valid and useful horn expansion, it's more a consequence of practical implementations of straight sided sections. Taken in the context of waveguiding versus horn loading might come to different conclusions, but broadly speaking a contour that turns inward (opposite of expansion or holding conical at the least) might create internal reflections (directly, as opposed to through diffractions).
 
#29
Can be, just look at the number of simple fold horns done here. 😉 Regardless, a typical room corner with one set of parallel walls is a parabolic expansion, so ideally need to factor it in regardless of whether the corner is horn, line array, etc., loading it.

GM
 
#30

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#31
Originally they were IIRC, but there's been what appears to be a whole room makeover. Also seems like there's a somewhat copy-cat system, which maybe has/had the originals.

A real shame that google now only shows us only a tiny fraction of the pictures of what I/presume we, search for or we could still see its changes and all the other big rigs posted around the world at least since '96 when I got online. The oriental [Japan, I presume] big built-in FLH 'sub' woofer with the W.E. 15s suspended in front with other W.E. 'fill' horns scattered around was my sentimental fave.

GM
 
#34
Allright I think I got it, the expansion is parabolic because the driver is inside the corner. Expansion is more than 90 degrees until walls limit the expansion to 90 degrees. Driver and part of the horn outside the corner could support some other horn expansion type.

Is there any tall and small footprint corner bass horns anywhere actually? I thought there would be (as in the OP), but I guess they aren't around? Avantgarde XD seems to be just a pile of folded horns, thought that was something else 🙂 Found these as well, a pile o FLH Model 91 Corner Horn Speaker Image Gallery. Both have rather large footprint..

I'm trying to find out if a small footprint (front loaded) bass horn is possible by utilizing the whole room height. I'm fine with a ported box currently, but FLH would perhaps provide acoustic low pass and smaller foot print is always nice. Maybe not possible, just scanning the opportunities here 🙂
 
#38
There isn't really a horn that terminates correctly into a whole corner, except for an eighth space waveguide (although it may be used to benefit a much foreshortened horn).

However you can run a horn onto two of the walls and keep the third one free for continued expansion. With some creativity you can save much space this way.
 
#39
AllenB, could you post quick sketch to illustrate a bit? I have to use room corners for speakers so exploring ways to utilize the corner to the max, eight space waveguide sounds like a candidate. Thanks!

Planet10, thanks for the link!
 
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#40
The guy that owned the company making one of the early noise reduction boxes was well known for his giant cement horn setup. Name started with a B. Can't find it in the WEB any more. I guess a fun project for someone with money to burn.

Somewhere I read about the horn used for testing rockets by NASA. It could simulate a Saturn 5 liftoff.
 
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