port tube length

Printed From: the12volt.com
Forum Name: Fiberglass, Fabrication, and Interiors
Forum Discription: Fiberglass Kick Panels, Subwoofer Enclosures, Plexiglas, Fabrics, Materials, Finishes, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=117919
Printed Date: May 11, 2025 at 12:14 AM

Topic: port tube length

Posted By: nafarious21
Subject: port tube length
Date Posted: November 21, 2009 at 5:09 PM

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.

Replies:

Posted By: whiterob
Date Posted: November 23, 2009 at 10:54 PM

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.

Posted By: nafarious21
Date Posted: November 24, 2009 at 5:52 PM

will the 90 affect sound performance and also if you are using a pvc elbow why cant you use the pipe as well?

Posted By: whiterob
Date Posted: November 24, 2009 at 6:14 PM

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...

Posted By: nafarious21
Date Posted: November 25, 2009 at 1:44 PM

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?

Posted By: nafarious21
Date Posted: December 17, 2009 at 12:49 AM

can anyone help me with this one?

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