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Old 10th January 2010, 03:18 PM   #1
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Default inside a folded horn

Can someone explain the inter foldings inside a folding horn

What does it do
Does the foldings affect the feqs
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Old 10th January 2010, 03:31 PM   #2
AndrewT is online now AndrewT  Scotland
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the foldings change a long straight horn into a more compact box that can be moved around more easily.
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Old 10th January 2010, 03:37 PM   #3
tinitus is offline tinitus  Europe
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Someone once claimed that there should be foldings close to driver, as it filters out some of the midrange
Others say that roundings are not needed
Some may even claim that it works better without roundings
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Old 10th January 2010, 04:09 PM   #4
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Everytime we get a "bulge" in a resonant pipe, that bulge acts as a low pass filter. By not making the folded path as "smooth" as possible with roundings or corner deflectors you can gain a lot of low-pass into your horn/resonant pipe -- usually a good thing.

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Old 10th January 2010, 04:25 PM   #5
Volenti is offline Volenti  Australia
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Quote:
Originally Posted by planet10 View Post
Everytime we get a "bulge" in a resonant pipe, that bulge acts as a low pass filter. By not making the folded path as "smooth" as possible with roundings or corner deflectors you can gain a lot of low-pass into your horn/resonant pipe -- usually a good thing.

dave
I have noticed this effect in my designs, it's pretty signifigant. (allbeit with folded TL's, but same principle)
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Old 13th January 2010, 03:58 AM   #6
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Quote:
Originally Posted by planet10 View Post
Everytime we get a "bulge" in a resonant pipe, that bulge acts as a low pass filter. By not making the folded path as "smooth" as possible with roundings or corner deflectors you can gain a lot of low-pass into your horn/resonant pipe -- usually a good thing.

dave

does that make it a lot less efficient or just a little?
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Old 13th January 2010, 04:56 AM   #7
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It alters the bandwidth. If the higher frequencies don't make it "around the corner" so to say, the enclosure attenuates the higher frequencies. This can be a good or a bad thing, depending on your desired outcome.
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