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Port Question

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=13113
Printed Date: May 29, 2024 at 6:53 AM


Topic: Port Question

Posted By: gdog_mm
Subject: Port Question
Date Posted: May 04, 2003 at 12:08 AM

I havent been able to find the answer to my question anywhere. When porting a box, how does the size of the port related to SPL? LIke will a 4" port tuned at lets say 35HZ give you a higher spl reading that a 3" port tuned at 35HZ ?????

a Lil confused, please help,
or anyone know of a link that explains this please post.
thanksposted_image



Replies:

Posted By: Velocity Motors
Date Posted: May 04, 2003 at 9:57 PM
As long at the port tuning frequency is the same on both scenarios, the SPL will not be any higher. The only way to get a higher SPL is to give the sub more power at 35 hz's. The only reason for the port diameter difference is for boxes that can not support a longer 3" port so they go for a 4" shorter port. The prot length plays a part in the tuning frequency as well, kinda like a pipe organ. The taller the stacks the deeper the bass frequency.

-------------
Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA



Posted By: gdog_mm
Date Posted: May 04, 2003 at 10:16 PM
thanks for the help


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