slot port length calculator
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=137023
Printed Date: May 02, 2024 at 5:18 AM
Topic: slot port length calculator
Posted By: gmansontos
Subject: slot port length calculator
Date Posted: July 29, 2014 at 2:09 PM
I'm unsure about some details about my port length or maybe I'm just thinking too much into it but the calculator asks for port width / port hight / box volume and hz I want tuned to. Ok this all makes sense to me except, first "do I need to subtract subwoofer displacement and port volume when figuring my box volume?". Second "is the port length measured from inside the box or from the face?" (I'm using 3/4 inch MDF board.) Third "do I need to calculate another way when two subwoofers are sharing the same port?"
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Gman
Replies:
Posted By: gmansontos
Date Posted: July 29, 2014 at 2:56 PM
More info...I have two kicker L3 15" subs running on a kicker 1000.1 zx amp. Box currently built is 8.87 cubic ft total. I don't have the manual but I believe the two subs combined displacement is .32 cubic ft (.16 each) box hight is 21" /width is 44"/ depth is 20". (Measured from outside dimensions) Using 3/4 MDF. Port is 3" width/ 19.5" hight/ (9.75" depth ,measured from inside box) (measured from face 10.5) vehicle is 06 trailblazer roof and back hatch dynamated. If I believe I'm using the slot port length calculator correctly my box should be tuned at 33.88hz...no?
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Gman
Posted By: gmansontos
Date Posted: July 29, 2014 at 2:58 PM
And yes both subs share the port which is located in the center of the box between the subs (subs and port all face same direction)
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Gman
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