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Night Crow
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Hi, i'm making a wall, but i have some doubts... The port tunning is the same as in a regular ported enclosure? I have seen walls with just the width of the front wall for the port length, is this because the area of the port is big? or there is a different formula for tunning the port in a wall?

What other things I need to consider for the dimensions of the wall?

I will use 2 DD9518g with a Stetsom 7KD at 16 volts...

Thanks

Posts: 4 | From: Chihuahua | Registered: May 2009  |  IP: Logged | Report this post to a Moderator
Cr@sh
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It's pretty much the same method for port tuning, JL's site has the mathmatical version here: http://mobile.jlaudio.com/support_pages.php?page_id=165

But as for tuning for sound 15-19 cubic inches of port area per cubic ft will give you well rounded sound quality in most cases.

For spl the tuning is typically higher and therefore much less port area is required. For instance I run 4-15" subs that are 2500 rms each, I have 16 cubic ft of enclosure and around 300 cubic in of port total, that gave me a peak note of 42 hz and it played everything very well. Now I run about 100 cubic inches of port, the opening is still 30"tall x 10"wide but now only 4" deep compared to the sound q size of 10" deep and now my tuning is around 62hz with a 2db gain but it sounds terrible. Best thing to do if you can is design a removable port system where you can build and experiment with different port sizes to achieve your goals!

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Posts: 694 | From: Michigan | Registered: Jul 2008  |  IP: Logged | Report this post to a Moderator
Night Crow
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Thanks Crash, I will start my project...
Posts: 4 | From: Chihuahua | Registered: May 2009  |  IP: Logged | Report this post to a Moderator
Boogie Woogie
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post pics too kind sir

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Posts: 2518 | From: philcampbell, al | Registered: Aug 2006  |  IP: Logged | Report this post to a Moderator
Night Crow
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Sure! Once I start I will be posting pics... The first is to build the steel structure...
Posts: 4 | From: Chihuahua | Registered: May 2009  |  IP: Logged | Report this post to a Moderator
   

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