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port tube length


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nafarious21 
Member - Posts: 5
Member spacespace
Joined: January 14, 2008
Posted: November 21, 2009 at 5:09 PM / IP Logged  
I'm making my first ported sub box for a 15" MTX thunder 6000 4 Ohm and the box volume i'm gonig to be making is 3.5ft^3 and it calls for (2)4"x15" vent. Do they really make port tubes that long and if they do where can i get one that curves becuase the box is to small for 15" length.
whiterob 
Copper - Posts: 351
Copper spacespace
Joined: July 22, 2007
Location: United States
Posted: November 23, 2009 at 10:54 PM / IP Logged  
Yes, they do make port tubes that long. If you look on partsexpress.com you can find a port that has that length.
In order to be able to fit the port in your enclosure you should get a 90 degree bend. If you go to a local hardware shop such as Lowes you can find a 90 degree PVC fitting that will work. There are a few different sizes depending on the thickness of your port but you should be able to find one that will work.
nafarious21 
Member - Posts: 5
Member spacespace
Joined: January 14, 2008
Posted: November 24, 2009 at 5:52 PM / IP Logged  
will the 90 affect sound performance and also if you are using a pvc elbow why cant you use the pipe as well?
whiterob 
Copper - Posts: 351
Copper spacespace
Joined: July 22, 2007
Location: United States
Posted: November 24, 2009 at 6:14 PM / IP Logged  
nafarious21 wrote:
will the 90 affect sound performance and also if you are using a pvc elbow why cant you use the pipe as well?
You can use a PVC pipe if you wanted. The 90 degree elbow will not effect sound quality.
I would look for something like this for an elbow for an example...
nafarious21 
Member - Posts: 5
Member spacespace
Joined: January 14, 2008
Posted: November 25, 2009 at 1:44 PM / IP Logged  
alright thanks i learned something. oh and also the port tube calculator on this website says that the length should be (i cant remember exactly) 4" but the manual says 15" should i just stick with the manual?
nafarious21 
Member - Posts: 5
Member spacespace
Joined: January 14, 2008
Posted: December 17, 2009 at 12:49 AM / IP Logged  
can anyone help me with this one?

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