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Discussion Starter · #1 ·
Hi, I'm new to the forum, and I'm trying to learn about folded horns. I'd like to try a subwoofer project after seeing some pretty cool designs. I've read quite a few posts on quite a few forums and I'm still not sure if I understand all the parts/area of horn design. I've sketched out a schematic and attached it as a PDF. I'm punching numbers into HornResp and trying to understand what a throat adapter is among other things.

I've color coded the rear volume, what I think is the throat adapter, and 3 sections of the horn. I've seen some designs with a compression chamber, and I'm wondering if my two first sections, are really the compression chamber. Then that would mean my tapered part is the real horn. Or should I taper all the way to section 1? Then do I need to make sure section 2's area matches the area of the cone?

Basically I thought i had a grasp and had a good horn laid out. The I read another post that made me think section 1 needed to start with a cross section equal to the area of the woofer cone. Suddenly my horn was way too short.

Thanks in advance, tons of cool posts here, this is an awesome forum.
 

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That pic is taken from Maxmercy's thread on how to make an offset horn design.
http://www.avsforum.com/t/1211856/simple-offset-driver-hornresp-tutorial-how-to-design-your-own-bass-horn

There are lots of variables when designing a horn. So once you simulate a few offset horns, tapped horns and others it will all come to.

S1 can vary. The opening can also vary. Doesnt have to be a perfect opening for the woofer. S2 is your compression. Sd/S2 for your compression ratio. You can do a 3, 4 or more segment horn also.

I am only scratching the surface here. Was there a speaker you were trying to horn load?
 

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Discussion Starter · #3 ·
THX chrapladm, sorry I dropped off the radar for a couple months. I've been tied up acquiring parts for my build and cleaning up the garage to make space. I did end up going with the THT for now and I'll try to design and build my own next. Thanks for the info and pointer, I'll read up on it!
 

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THT is a great sub. There are a few others out there that might perform better but Bill's plans are worth it. I built my THT a while back and loved it. Great horn, easy directions and I only used about 28V at max volume. Just a killer horn. Congrats. :T
 
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