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Old 31st December 2009, 04:09 PM   #1
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Default best sub for outdoor use

Hello can someone tell if folded horn is better to use outdoor then tapped horn
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Old 31st December 2009, 05:46 PM   #2
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When you have multiple front loaded horns in a stack, they use the total mouth area and get deeper as well as louder (more efficient). A TH doesn't behave that way. It just gets louder.
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Old 31st December 2009, 06:54 PM   #3
jbell is offline jbell  United States
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what davy said:

However, I'll add one more bit of info. TH has a higher directivity than FLH, so if you are in the middle of a field, with no structures around -- that needs to be taken into consideration.

The bigger your stack of FLH, the higher it's directivity, and the less of an advantage goes to the TH.

So... FLH vs TH outdoors is like getting older.... it depends.
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Old 1st January 2010, 12:30 AM   #4
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Jbell is ciare sw 18 a good speaker to use in foldedhorn to give off deeep loud bass.
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Old 1st January 2010, 01:55 AM   #5
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For what folded horn?

What size can you accept? How many will be in the pile? What is the SPL goal? What is the cutoff (F3 and F10) you want?

Large cabinets are more efficient. More smaller cabs will equal lesser large cabs, but will cost more in terms of drivers. There's a delicate balance with the compromises one has to do.
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Old 1st January 2010, 03:03 AM   #6
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Davy size of the box is no problem large is fine
Feq 25hz to 120 hz
Spl 140 or higher
I wan to build 4

I do not know what f3 mean
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Old 3rd January 2010, 09:45 PM   #7
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"When you have multiple front loaded horns in a stack, they use the total mouth area and get deeper as well as louder (more efficient). "

Click the image to open in full size.

The measure data from EAW on their KF940 seems to be at odds with your statement.

" do not know what f3 mean "

F3 is the point at which the system is 3dB down at.
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Last edited by djk; 3rd January 2010 at 09:49 PM.
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Old 4th January 2010, 06:21 AM   #8
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Quote:
Originally Posted by djk View Post
The measure data from EAW on their KF940 seems to be at odds with your statement.
Go read the theory papers on how mouth areas become combined. Some people refer to it as a pressure bubble.
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Old 4th January 2010, 09:03 AM   #9
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"Go read the theory papers on how mouth areas become combined. Some people refer to it as a pressure bubble. "

So why does it not show up in the measured data?
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Old 4th January 2010, 09:07 PM   #10
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Quote:
Originally Posted by djk View Post
So why does it not show up in the measured data?
I don't care about other peoples broken data. If I had a magnifying glass to see the detail around 30-40hz I might be able to comment. But I do notice one thing, the graph doesn't flatten with two speakers. I gets more peaky. And how is the level at 30 Hz nearly the same? Even if all the subs were driven with the same total power an efficiency gain should be shown, but it isn't. Something is wrong with their chart.

Make your own measures and judge for yourself.
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Last edited by davygrvy; 4th January 2010 at 09:10 PM.
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