off-axis port opening
Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=80502
Printed Date: July 18, 2025 at 12:05 AM
Topic: off-axis port opening
Posted By: atxz06
Subject: off-axis port opening
Date Posted: July 19, 2006 at 5:31 PM
What is the effect of having a port opening that is off-axis with the speaker (rear facing, side facing, or any other orientation relative to the face of the speaker) on accoustical or spl performance?
I searched and researched but couldn't find anything addressing this subject area.
Thanks.
Replies:
Posted By: stevdart
Date Posted: July 19, 2006 at 7:15 PM
You shouldn't be able to tell any difference as long as the port opens into the same airspace as the driver (e.g. trunk, etc.).
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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.
Posted By: jeffchilcott
Date Posted: July 19, 2006 at 7:20 PM
we just built yet another L7 box, that the port is off-axis.....the sub is rear firing and the port is passenger firing.
I have noticed with the seats down on some lower notes I hear more port noise then I would like to....I think this has to do with the fact that the port is side firing right next to the opening to the trunk from the cab
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