Horn Extender/Wave-guide for TH - Page 2 - diyAudio
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Old 14th January 2012, 05:36 PM   #11
Djim is offline Djim  Netherlands
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Hi Ben,

Thanks, but I don't use fancy software for that, just draw them in Paint.
Nope, they don't have to flare out if you know what you are doing. Large waves don't see anything that small. You can even make your TH out of 6 straight sections if it doesn't need to play above its full wavelength. This one was another rough idea to make the SS15 (Xoc1 optimised version) couple better in stacks, loaded with the Monacor SP15/500FH.

Last edited by Djim; 14th January 2012 at 05:40 PM.
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Old 14th January 2012, 05:58 PM   #12
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Default Nice

Your paint skills certainly exceed mine!

Occasionally I have seen a few quite pricey subs extended like this...

though I must say, years ago when I saw my first one, I thought it was BS - a bass reflex box with the sides, top and bottom extended forward maybe 3 times the depth of the cabinet!

This does of course mean that we could make a 19mm sleeve that slides completely over the cabinet for transport / storage and extends when in use by sliding out.

It could be braced very much like you have indicated at the front, maybe I'd add diagonal or angled bracing.

Regards, Ben
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Old 14th January 2012, 06:09 PM   #13
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Default Would something like this have a greater effect?

http://sp3.fotolog.com/photo/19/50/9...65648953_f.jpg


The Levan horn extension

or does one design make the system more directionalClick the image to open in full size. whilst another increases efficiency or lowers cutoff?

Regards, Ben
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Old 14th January 2012, 06:14 PM   #14
Djim is offline Djim  Netherlands
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Hi Ben,

In the end he used a iron frame with mash front and for attachment he used 'butterfly' connections, as used in flightcases. It seems to work very well and he uses the extension units for storing his cables. The goal was freq. extension to 40Hz and had to fit in his station car with a max of 400Euro for 2 drivers.

Yes, it does improve coupling in stacks gives an improved directivity pattern and some low end extension.

Last edited by Djim; 14th January 2012 at 06:19 PM.
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Old 14th January 2012, 06:23 PM   #15
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Default flat to 40Hz

is very good for a cabinet that small and efficient! I am thinking about building an extender for my sixpack, once that is complete.

And now I'm off to make some sawdust!

Regards, Ben
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Old 14th January 2012, 06:26 PM   #16
Djim is offline Djim  Netherlands
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Btw the extension for Xoc1's optimization of the SS15 is 27,2cm deep, but it will do for the standard SS15 as well.

Last edited by Djim; 14th January 2012 at 06:38 PM.
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Old 15th January 2012, 12:04 AM   #17
Djim is offline Djim  Netherlands
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Click the image to open in full size.

Edit: 3015lf is the old version

Last edited by Djim; 15th January 2012 at 12:09 AM.
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Old 15th January 2012, 01:54 AM   #18
djlivex is offline djlivex  United States
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I am thinking about putting a horn mouth attachment infront of Marc O. Double MBP-46 getting the wood in two weeks, I will put up pics when I start, thanks!
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Old 15th January 2012, 02:15 AM   #19
Djim is offline Djim  Netherlands
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Quote:
Originally Posted by djlivex View Post
I am thinking about putting a horn mouth attachment infront of Marc O. Double MBP-46 getting the wood in two weeks, I will put up pics when I start, thanks!
Hi Djlivex,

A reflector like 'side ears' that Art suggested will work but a true extension of the system will give troubles since it is a 'tuned' bandpass and not a 1/4WL horn or pipe.
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Old 15th January 2012, 04:11 AM   #20
djlivex is offline djlivex  United States
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Huh, so you think it wont work in Marc's MBP-46 I was planning to build 2 MBP in one enclosure and building an extension piece about 20" long horn mouth extender same angle as the horn mouth? Thanks!
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