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-   -   floor to ceiling horn? (https://www.diyaudio.com/forums/full-range/363061-floor-ceiling-horn.html)

anchorman 15th November 2020 06:54 PM

floor to ceiling horn?
 
1 Attachment(s)
So I've been back to thinking about line arrays, and how to get better bass response with them without resorting to ridiculous amounts of boost. Wondering if there is anything like this idea here to have the opening of a horn go floor to ceiling? Not sure how it would work, perhaps a couple of large drivers inside the main part of the cabinet, with an array of tweeters at some point inside of the horn? I was thinking this might be able to help have better off axis response?

or perhaps a line of full range drivers inside the horn with some sort of exponential taper to it? if it were sized right, maybe could make up for the falling response of the array on the high end, and at least remove that EQ hurdle?

construction could be either stacked MDF/plywood, or better would be to cut slits and bend along its length, since stacked wood that high is asking for trouble. Not sure how to get the drivers inside, but an access panel on the front might allow for the to be put in on the inside of a baffle facing the horn.

This is probably a crazy idea, but maybe it's a stroke of genius? I was originally thinking that it would be a way to have a relatively large cabinet for a bass to mid speaker that would feed the sound out alongside a floor to ceiling array, or symmetricly along both sides of an array of tweeters placed in the middle of the horn opening.

Attachment 893591

bradleypnw 15th November 2020 08:35 PM

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The modal region of your room will place a limit on how much benefit you'll gain by pushing your arrays into the bass frequency range.

Instead, design your arrays to work down to the modal region then cross over to a separate low frequency loudspeaker system.

anchorman 15th November 2020 09:41 PM

That’s the plan actually, but I was simply curious if anyone had ever tried to make a floor to ceiling horn type speaker. Maybe not full transmission line length to the horn, but something to behave like a line array in terms of sound. Maybe it wouldn’t need so many drivers to get the same sound pattern as an array to have a horn-like opening that goes floor to ceiling like this?

anchorman 15th November 2020 09:43 PM

Your chart has some odd numbers. 2500 sq ft is not a “small domestic room”, that is bigger than most people have for the whole house!

Twellmann 15th November 2020 09:54 PM

The numbers are for volumes, cubic feet.
2500ft^3/8ft (ceil height) = 312ft^2 floor area

anchorman 16th November 2020 12:18 AM

Quote:

Originally Posted by Twellmann (https://www.diyaudio.com/forums/full-range/363061-floor-ceiling-horn-post6413015.html#post6413015)
The numbers are for volumes, cubic feet.
2500ft^3/8ft (ceil height) = 312ft^2 floor area

That makes much more sense!

anchorman 16th November 2020 12:20 AM

Still not quite what I would call a “small” domestic room, but much closer! ;)

planet10 16th November 2020 02:49 AM

You can get 3-4 octaves out of a horn.

With an array you could like use those in the bottom octaves.

Divide the wall you are listening to into 2 and then design a back horn to a mouth that will probably need to slit load the array to get a mouth anywhere near small enuff for horn loading — just a wild *** guess, i’ve only done the math for midrange arrays.

What is on the other side of the wall? I knew someone on one of the local islands that had concrete horns extending out into his garden.

dave

anchorman 16th November 2020 05:28 AM

I’m wondering if the lows-mids could be coming from an appropriate sized enclosure, but radiating from the slit/horn shape? It doesn’t seem like you could feed a vertical slit like that with a horn long enough horn to have it help extend the bass.

anchorman 16th November 2020 05:29 AM

Concrete horns in the garden does sound like a good idea, but we have too many animals and nasty stinging/biting insects that would love to take up residence in something like that.


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