Port Length
Printed From: the12volt.comForum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=11769
Printed Date: August 11, 2025 at 8:01 AM
Topic: Port Length
Posted By: mark241
Subject: Port Length
Date Posted: April 02, 2003 at 6:41 PM
Replies:
Posted By: wrencher_25
Date Posted: April 02, 2003 at 7:26 PM
I don't know of any chart like that....but if you're looking to design a port, i'm going through my grad book from Mobile Dynamics in Toronto. (I gotta keep up to date too!!! 
) And i'll give you some of the things that we learned and they told me from my notes. (They're just small pointers when designing a ported box).
-In a vented box, the port length shouldn't be more that 4x it's diameter.
(DON'T USE AS A RULE BUT IN GENERAL......) >>>>
8" = 1-2" in diameter
10" = 2-3" in diameter
12" = 3-4" in diameter
15" = 4-8" in diameter
-I'm guessing that you wanted the chart to aviod formulas...but if you just hate math or anything like that I could help you out on them or do em for ya if you wanted. Just give me the specs that I need from the type of driver you are using. Hope that helped a bit....
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Andrew Weitzel
MECP First Class Installer
Posted By: Velocity Motors
Date Posted: April 02, 2003 at 10:33 PM