Parabolic port?????????????

digitalaudio · 7th August 2003, 12:53 AM

Does anyone know what this is? I was told that this is what I should be using, but the source that told me about it would not say anything more. I am very puzzled. Is this kinda like the Karlson slot?

GM · 7th August 2003, 04:08 AM

No, the K-slot spreads a pipe's output over a wider BW, ergo it's a high pass filter. A parabolic vent is a low pass filter, like a high performance vehicle's exhaust resonator.

GM

kelticwizard · 7th August 2003, 12:42 PM

GM:

Could you give us a description of this parablic vent? Does the end open up like a horn, or something like that?

GM · 7th August 2003, 01:36 PM

For use as a cab vent, the ends would normally be identical, but could be different, with the body of the tube expanding, IOW the opposite of a vent flared at both ends.

HTH,

GM

digitalaudio · 7th August 2003, 01:50 PM

So can you give me a description of how it works and what it looks like? Also How do you tune it?

7th August 2003, 12:53 AM	#1
digitalaudio diyAudio Member Join Date: Aug 2003 Location: USA	Parabolic port????????????? Does anyone know what this is? I was told that this is what I should be using, but the source that told me about it would not say anything more. I am very puzzled. Is this kinda like the Karlson slot?

7th August 2003, 04:08 AM	#2
GM diyAudio Member Join Date: Jun 2003 Location: Chamblee, Ga.	No, the K-slot spreads a pipe's output over a wider BW, ergo it's a high pass filter. A parabolic vent is a low pass filter, like a high performance vehicle's exhaust resonator. GM __________________ Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.

7th August 2003, 12:42 PM	#3
kelticwizard diyAudio Member Join Date: Sep 2001 Location: Connecticut, The Nutmeg State	GM: Could you give us a description of this parablic vent? Does the end open up like a horn, or something like that? __________________ "A friend will help you move. A really good friend will help you move a body." -Anonymous

7th August 2003, 01:36 PM	#4
GM diyAudio Member Join Date: Jun 2003 Location: Chamblee, Ga.	For use as a cab vent, the ends would normally be identical, but could be different, with the body of the tube expanding, IOW the opposite of a vent flared at both ends. HTH, GM __________________ Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.

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7th August 2003, 01:50 PM	#5
digitalaudio diyAudio Member Join Date: Aug 2003 Location: USA	So can you give me a description of how it works and what it looks like? Also How do you tune it?

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