Insanity HT Horn

[Tehrasha]

In my previous post, I made mention of crazy design for a bass horn to be used as the projection screen in an HT setup. So here it is. If I am correct, this bottoms out around 27Hz. Bracing obviously not shown.

Dimentions == 96"x96"x24"
Throat Area == 144 sqin. (72x2)
Mouth Area == 16 sqft.
Taper Rate == 30"
Horn Length == 126"


Front and Side elevations.


3/4 View

Provided it doesnt collapse under its own weight, I am thinking of using a pair of Assassin 12" drivers for this. Back volume has lots of room to play with. (6 cuft as shown)

My plans on paper have this as two pieces (upper and lower) so it does not have to be build on location, but any way you slice it, its still huge.

[Eva]

It's looking good. What software do you use to model horns in 3D?

[tade]

sweeeeet

[Tehrasha]

Originally posted by Eva
It's looking good. What software do you use to model horns in 3D?

Those were done with
Blender.

[synergy]

so the screen is going to be fastened to it from the top and the bottom edge will be the edge of the mouth correct?

what are you going to do about the center speaker?

reckon with a bit of fudging of dimensions to allow for the box volume you could probably mount it in the box and have it fire directly through the center of the screen

[tinitus]

That sure is a big one

I would say if you skipped that od V-shaped start of "line" - you could tilt that rearchamber and get woofers further down and get a longer loadline - that V-shape have wrong angles anyway - too steep, as far as I can see.
And I think you need a V-shape at top of the last folding

Is this both channels or will there be two of them?

[tade]

i second synergy. That would be super sweet and I dont think it would be too tough.

[Magnetar]

I did that with three horns and three JBL 2242H 18's.

It is good.

[Tehrasha]

Originally posted by tinitus
That sure is a big one

I would say if you skipped that od V-shaped start of "line" - you could tilt that rearchamber and get woofers further down and get a longer loadline - that V-shape have wrong angles anyway - too steep, as far as I can see.

The angles should be correct. They cut the volume in half over a distance of 30 inches. The 12" woofer sits over a 9.6" hole, which give is a throat area of 72 sqin. (which matches the combined area at the bottom of each side of the ^) and a compression ratio near 1.5:1.

And I think you need a V-shape at top of the last folding

I totally forgot to put the reflectors in the upper corners and the top center. Will have to fix. Thanks!

Is this both channels or will there be two of them?

TWO!? Getting my wife to let me build one will be difficult enough.
I plan to drive it from a bridged amp, fed by the sub-outs on my HT receiver.

[rcavictim]

Magnetar,

Your speakers must image like crazy. Just by looking at the picture I got a sense of it! I thought I was at a ball game.