Horn Sub Input Please - Build In Progress! - Page 8 - Home Theater Forum and Systems - HomeTheaterShack.com

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post #71 of 261 Old 03-30-13, 05:23 PM
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re: Horn Sub Input Please - Build In Progress!

Quote:
Question though I never modeled or folded with throat area/volume. Just wondering how to interpret those numbers?
Well tis the secret in the sauce my friend.

When you do midrange horns you have to get even more finely balanced.

OK how to interpret the results.

I did the same manifold on all the horns. A square area 13" x 13" x 1". Lets you set your driver in place and gives you enough room for X-Mechanical. Personally I make a throat mounting plate. That is the 13" square piece with a hole cut out of it to accept the driver from the rear side of the plate. You can use screws if you are looking to save money. Number ten or twelve with a pilot hole the size of the screww shaft less the threads will help you get a good tight fit.

Again if you are on a budget. I have built many boxes out of OSB makes for a very strong box if you use the speaker builders secret weapon.

So you are doing offset horns. I designed the midbass so that the mouth could be done in a 15 inch wide enclosure. So if you do it with 1/2" material you are laughing.

The compression chamber is a part of the horn. You make the 13" x 13" x 1" box and cut out a hole the size of the S1 on this, and from here you start your horn. the hole is roughly 4 5/8" square.

Hornresp will give you inches on any hi-lighted number if you press F-6.

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Last edited by mwmkravchenko; 03-30-13 at 08:09 PM. Reason: Fixed horn resp to Hornresp
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post #72 of 261 Old 03-30-13, 05:28 PM Thread Starter
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Perfect. Thank you. I will get these folded up within the next week and let you know!
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post #73 of 261 Old 03-30-13, 05:47 PM
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re: Horn Sub Input Please - Build In Progress!

Just one thing to ask.

Please share this.

My guess is that alot of people are looking at this thread. You may have started a monster!

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post #74 of 261 Old 03-30-13, 05:56 PM Thread Starter
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Yeah it is a possibility. Find out once its built, and my house falls down.
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post #75 of 261 Old 03-30-13, 06:07 PM Thread Starter
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When I fold the riser sub can both drivers be in the same rear chamber with the volume doubled. Or would it be best to have them in their own chamber??
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post #76 of 261 Old 03-30-13, 06:11 PM
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re: Horn Sub Input Please - Build In Progress!

A half watt amp could be a current boosted op amp.

Or a really loud MP3 player.

Or if you are really determined yell into the wires at one end and hope for the best

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post #77 of 261 Old 03-30-13, 06:12 PM
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re: Horn Sub Input Please - Build In Progress!

Single enclosures sir. You want all of them to have their own spring. The rear enclosure keeps the system efficient. It has been sized with enough care that it should behave itself.

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post #78 of 261 Old 03-30-13, 07:05 PM Thread Starter
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Note taken no problem they will be in there own.
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post #79 of 261 Old 03-30-13, 07:52 PM Thread Starter
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re: Horn Sub Input Please - Build In Progress!

Quick question how come the ULF subs where modeled as ND and not OD alignment?
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post #80 of 261 Old 03-30-13, 08:05 PM
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re: Horn Sub Input Please - Build In Progress!

Quick answer. Because I chose to.

Nd is a field where you can change the number and position of the driver.

Switching the simulation to OD everything looks like it has gone down the toilet.

But worry not.

The way things work in real life on the low end only are not as bad as it may seem.

If you are at all worried, the way you make this completely to design is start off the horn with a square profile off of the manifold and expand until you are wide enough to support the height of the riser with the full width of the horn taking up all the space.

Again if these are buried under the riser OSB is plenty good enough. There are pictures on this website of a large scale horn I did out of 7/16" OSB that was strong enough for me to walk all over with no flex at all.

Bracing is your best friend no matter what you use for material.

And the secret weapon of the box builder is PL Premium.

That and a nail gun.

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Last edited by mwmkravchenko; 03-30-13 at 08:08 PM. Reason: A wee bit of clarification
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