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Old 5th August 2010, 05:40 PM   #11
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I did the math ... the back chamber is 21 liters less the driver volume. I would guess the driver volume to be 2 liters.

Closing the 7 inch baffle spacing to 6 inches and replacing the two piece baffles with one piece .75 inch thick baffles, would increase the compression
ratio from 2:1 to 2.35:1 and increase the back chamber by 2.7 liters. This would require a redesign of the horizontal flare panel, but that's elementary.

Would anyone be interested in building this mod?
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Old 5th August 2010, 07:08 PM   #12
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I might be interested in that mod as long as there's still enough space to do my mods too - flipping one of the drivers around and connecting the back chambers. I'll have to do some more modelling but I suspect we can probably take great liberties with the first few inches of the horn with little consequence.

I wouldn't attempt this mod unless someone else was going to redesign the flare though, since I can't design a complex flare like this one.

And by the way, I checked out the TH115, and while the tapped horn certainly has advantages when the mouth size is small, by the time you get to a mouth size of 4 Labhorns on the ground (or 1 unit corner loaded), the tapped horn doesn't seem to be the better choice anymore.

Last edited by just a guy; 5th August 2010 at 07:12 PM.
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Old 5th August 2010, 09:26 PM   #13
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Thomas Danley said there was no advantage to a Tapped Horn once it got to the size of a full horn.

Most of the Aeronautical Eng students today, don't take the Geo Drafting class. They rely on 3-D CAD for problems like this.
It will take me two hours to do the projections to detail the Horizontal Flare. I will do it if you will commit to building two LabHorns.
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Last edited by Don Snyder; 5th August 2010 at 09:36 PM.
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Old 5th August 2010, 11:34 PM   #14
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Thank you very much for the offer. I'm not ready to commit yet, at least until I get a chance to model the effect of these changes. I need some time to investigate this further. Thanks again.
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Old 7th August 2010, 10:44 PM   #15
dangus is offline dangus  Canada
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Have you tried accessing any of the dead websites using the Waybackmachine at Archive.org?
Internet Archive: Free Movies, Music, Books & Wayback Machine
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Old 8th August 2010, 03:36 AM   #16
soho54 is offline soho54  United States
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Quote:
Originally Posted by just a guy View Post
I'll look into it but not much of his new stuff is designed to excel between 30 - 120 hz and I'm not sure the new stuff would outperform the Labhorn significantly. I'll look into it though. Thanks.
There is the new dual 18" horn that isn't on the website yet.

It is his new Labhorn killer, and it is a regular horn to boot.
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Old 8th August 2010, 03:03 PM   #17
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Quote:
Originally Posted by dangus View Post
Have you tried accessing any of the dead websites using the Waybackmachine at Archive.org?
Internet Archive: Free Movies, Music, Books & Wayback Machine
No, I hadn't tried previously. This is the first time I've used it and it works great, thanks. Version 2 seems much like the original, while Version 3 is a significant departure, changing virtually every aspect of the horn. I'm still going through the websites but I'm not particularly interested in V2 or V3 at the moment.
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Old 8th August 2010, 03:06 PM   #18
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Quote:
Originally Posted by soho54 View Post
There is the new dual 18" horn that isn't on the website yet.

It is his new Labhorn killer, and it is a regular horn to boot.
I've never heard of it but I'd like to. A quick search didn't reveal much, probably since I don't know exactly what to look for. If it's significantly larger than the Labhorn I'm not interested in building it but I'd still like details.
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Old 8th August 2010, 04:18 PM   #19
soho54 is offline soho54  United States
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Here ya go, DBH-218

Quote:
It is a "regular" bass horn. Not a Tapped horn.

Like Art says-it is the same size as a Lab sub-but with a lot more "get up and go".

I have not listened to it a whole lot, but the target market is the kick drum slam market. It does have a bit more "punch" (here we go again with the "terms" Rolling Eyes Laughing ).

--Ivan Beaver
Quote:
And it has a lower and smoother low freq output than a lab sub.

The DB218 is a "normal" bass horn-so when you add more, the extension and smoothness will get better.

--Ivan Beaver
Attached Images
File Type: jpg DBH218.jpg (29.2 KB, 270 views)

Last edited by soho54; 8th August 2010 at 04:21 PM.
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Old 8th August 2010, 04:53 PM   #20
soho54 is offline soho54  United States
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PSW Sound Reinforcement Forums: Product Reviews: Sound Reinforcement => DBH 218
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