isobaric sealed box

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=107088
Printed Date: May 15, 2025 at 3:11 AM

Topic: isobaric sealed box

Posted By: 97srad750
Subject: isobaric sealed box
Date Posted: August 28, 2008 at 7:27 AM

I was thinking of trying this out. https://www.the12volt.com/caraudio/boxes2.asp#2 . My question is does the box need what the airspace would be for 1 sub or for 2 subs? Do these boxes sound good? Thanks for the help.

Replies:

Posted By: DYohn
Date Posted: August 28, 2008 at 8:14 AM

The enclosure size for isobaric loading is 1/2 what is normally required for 1 woofer. They sound just like any other sealed system.

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Posted By: 97srad750
Date Posted: August 28, 2008 at 9:42 AM

So my 10 calls for .5, then I only need .25 for both woofers?

Last one. The 2 10's will sound like 2 10's in the isobaric setup.

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Posted By: DYohn
Date Posted: August 28, 2008 at 9:55 AM

97srad750 wrote:

So my 10 calls for .5, then I only need .25 for both woofers?
Last one. The 2 10's will sound like 2 10's in the isobaric setup.

First statement: that's correct. Second statement: I have no idea what you mean.

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Posted By: haemphyst
Date Posted: August 28, 2008 at 11:09 AM

In answer to your second question: If you have a TOTAL QUANTITY of two 10's, clamshelled (face to face), then you will have the OUTPUT of one 10. You only have one radiating surface. Do the math. The ONLY difference is the volume required by the woofer. One radiating surface, two woofers. Output of one woofer, volume of 1/2 of one woofer.

To get the output of two 10's in isobarik configuration, you need a QUANTITY of four 10's - two clamshelled, and the other two clamshelled - for the radiating surface of two 10's.

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Posted By: 97srad750
Date Posted: August 28, 2008 at 12:26 PM

Thanks fellas. That answered it.