lots of port noise. help please

[sbarber82 10+ year member]

So I went down to a friends car audio shop yesterday and let him here my system. I spoke to him about the noise I mentioned in this post and he said there is turbulence building up at the mouth of the port and I will be able to get rid of it with a triangle that basically will break the port into two ports instead of two ports "sharing" the same mouth. Here is a drawing of what I need to do

 

[Iosias 10+ year member]

So I went down to a friends car audio shop yesterday and let him here my system. I spoke to him about the noise I mentioned in this post and he said there is turbulence building up at the mouth of the port and I will be able to get rid of it with a triangle that basically will break the port into two ports instead of two ports "sharing" the same mouth. Here is a drawing of what I need to do

I am surprised it isn't already using a 45.

Also if its a newer development then what makes you or your buddy think that is the issue? If it were it would have been creating the noise sense the beginning.

 

[sbarber82 10+ year member]

It wasn't new, when I added the other two subs is when it started. I didn't notice it until I opened the rear doors and was standing next to the port and heard the "turbulence" noise. The db output is getting louder and louder as the subs are starting to loosen up. You don't hear the noise up front, only when you are next to the ports you hear it. It makes total sense what he was saying about the "turbulence"

I am surprised it isn't already using a 45.
Also if its a newer development then what makes you or your buddy think that is the issue? If it were it would have been creating the noise sense the beginning.

 

[IonRL205 10+ year member]

I just want to know why there wasn't a 45 there to begin with

 

[sbarber82 10+ year member]

i couldn't tell you. I didn't build the box double07 did. I don't know much about box design so I didn't know it would need it… I am going to build one after my UNLV rebels finish this romp of Air Force!

 

[sbarber82 10+ year member]

Well I built and installed a wall separating the port into two sections. I have noticed a reduction in port noise so thats a plus. Now I am getting a hissing noise from one of the speakers like there is air escaping somewhere. I rotated the speakers because I wanted the logo's tilting at a 45 degree angle. Could it be that the old screw holes are letting air escape and it is squeezing its way out from under the gasket on the sub? I don't get it...

 

[IonRL205 10+ year member]

Well I built and installed a wall separating the port into two sections. I have noticed a reduction in port noise so thats a plus. Now I am getting a hissing noise from one of the speakers like there is air escaping somewhere. I rotated the speakers because I wanted the logo's tilting at a 45 degree angle. Could it be that the old screw holes are letting air escape and it is squeezing its way out from under the gasket on the sub? I don't get it...

Shouldn't be if the sub is completely sealed to the box

 

[sbarber82 10+ year member]

It is sealed thats why i don't understand why its doing it! Always something!