Driver inside of mouth of a folded conical horn - diyAudio
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Old 14th May 2009, 07:36 AM   #1
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Default Driver inside of mouth of a folded conical horn

Hello, has anyone of you built such a speaker? I've seen two pictures posted in other threads, but no comments as to how they sound or how to design one. I recall seeing one posted by hm with a Lowther driver and another by GM that looked vintage; circa 1950s.

I'm curious as to how to design and build one. Is it as simple cutting a conical horn in half and sticking the smaller half (reverse) into the larger half? Or is it something where a compression chamber or loading of some sort is created behind the driver and then exhausts into the throat of the horn? Or is it something completely different?

Would high QTS drivers be applicable given the short path akin to an open baffle?

Any help is appreciated. Thanks.
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Old 14th May 2009, 08:57 PM   #2
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Hmmmm. I don't know what you're talking about but ...

You could be referring to a driver with a front loaded horn (FLH) and rear loaded horn (RLH). Or a wave-guide front (very shallow horn). Or your could be referring to a "tapped" horn. This is where there's one horn but the driver is connected in two locations, one side near the terminous and one near the mouth.

Or is it something entirely different?
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Old 14th May 2009, 09:34 PM   #3
Jeb-D. is offline Jeb-D.  United States
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It seems like you are referring to a tapped horn. Do a search for "tapped horn" and see what comes up.
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Old 14th May 2009, 10:02 PM   #4
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Not a tapped horn.

Scroll down to post #7 by GM:

Front & rear end DUAL Back Loaded Horn + Bass Reflex Hybrid Enclosure
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Old 15th May 2009, 02:41 AM   #5
jamikl is offline jamikl  Australia
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I think he might be describing a reflex horn as seen in public address systems, but is interested in a higher fi version. I made a small corner horn like this once. Speaker was in small chamber right in corner, 1st part of horn out towards the room centre, second part back to the corner and the third part was the walls.
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Old 16th May 2009, 09:13 PM   #6
hm is offline hm  Europe
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Hello,

this he had in mind.
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Old 16th May 2009, 11:58 PM   #7
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Yes, that is it.

Thanks.

Looking at it again, I think it is more like an Onken.

Now if I could only hear one.
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Old 17th May 2009, 12:42 AM   #8
tinitus is offline tinitus  Europe
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another
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Old 17th May 2009, 06:50 AM   #9
hm is offline hm  Europe
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Hello,

"Looking at it again, I think it is more like an Onken."

not when you look at the plan.
http://www.hm-moreart.de/29.htm
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Old 17th May 2009, 09:07 AM   #10
el`Ol is offline el`Ol  Germany
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I once built ceiling firing speaker with driver directly beside the relatively small mouth. I wouldn´t say it satisfied me, but there was a clear difference in bass extension when I placed a board between mouth and driver.
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