Dual SDX10 Tapped Horn - Page 4 - Home Theater Forum and Systems - HomeTheaterShack.com

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post #31 of 144 Old 05-14-11, 09:55 PM Thread Starter
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Jeremy
 
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Re: Dual SDX10 Tapped Horn

This stuff ain't baltic birch quality, but it's pretty much the best quality imported cheap stuff I can find around here. The veneer will still peel if you let it, which is why I leave all the screws in after building, even after PL.

Home Depot's shop birch can't touch this stuff. 5 ply < 11 ply.
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post #32 of 144 Old 05-14-11, 10:12 PM
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Re: Dual SDX10 Tapped Horn

OK...maybe a stupid question (I'm quite the building novice)...why would one want remove the screws? Finished look?
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post #33 of 144 Old 05-14-11, 10:59 PM Thread Starter
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Re: Dual SDX10 Tapped Horn

Yeah. I've never really cared about making screws vanish though. Screws are cheap.
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post #34 of 144 Old 05-15-11, 03:51 PM Thread Starter
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Re: Dual SDX10 Tapped Horn

And now the fun part - giving away the plans



Sketchup zip file attached. It's 2D, but all internal panels are 300mm deep. Not hard to remember. I was too lazy to make this one 3D.
Attached Files SDX 3K.zip (249.3 KB) 

Last edited by Oklahoma Wolf; 05-15-11 at 03:57 PM.
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post #35 of 144 Old 05-16-11, 12:26 PM Thread Starter
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Re: Dual SDX10 Tapped Horn

3K has some errors in the corners, it turns out. No horn gain on the two 180 degree bends. Spent the morning working on it, and I now have a version 3L. Box length gets slightly shorter, horn gets slightly taller.

Not bothering with the Hornresp sim on this one. It's almost identical to 3K with a slightly higher corner. In comparisons with the Tang Band horn, however, the slightly higher corner and corresponding 3" shorter horn length is probably an issue with my quick and dirty Sketchup measuring. I won't lengthen this one any more out of concerns I'll run out of wood.

As is, 3L still fits on 3 sheets of stock. Still need the extension piece on that one internal panel. But there's horn gain in the corners again. Probably not the most mathematically accurate, but this is literally all I am willing to do on this. Y'all can pick 3K or 3L as you wish. I'm building 3L. Hoping to start cutting wood later this week as I find time.

Attached Files SDX 3L.zip (220.5 KB) 

Last edited by Oklahoma Wolf; 05-16-11 at 07:24 PM.
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post #36 of 144 Old 05-16-11, 06:47 PM
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Re: Dual SDX10 Tapped Horn

Would you be willing to add top/bottom measurements for those two turns, corresponding to the 233mm and the 137mm ones in the 3k plan? I think it would simplify tracing out board placement onto the side walls.
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post #37 of 144 Old 05-16-11, 07:11 PM Thread Starter
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Re: Dual SDX10 Tapped Horn



Better? Zip file in post 35 has been updated.

Last edited by Oklahoma Wolf; 05-16-11 at 07:30 PM.
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post #38 of 144 Old 05-16-11, 09:40 PM
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Re: Dual SDX10 Tapped Horn

Thanks!
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post #39 of 144 Old 05-16-11, 10:49 PM
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Re: Dual SDX10 Tapped Horn

It looks like you're using a 1.8mH series inductor. The graphs on hornresp look subtly better with the inductor in place-slightly flatter spl curve and about 1mm less peak excursion-but I'm not sure if there is another reason. Is this why? Also, how do you actually hook up the inductor?
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post #40 of 144 Old 05-16-11, 10:59 PM Thread Starter
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Re: Dual SDX10 Tapped Horn

I'm not using an inductor.
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