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Formula for subsonic filter frequency?


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luckydevil 
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Posted: September 03, 2006 at 3:15 PM / IP Logged  
I've been searching everywhere for the last couple days on something that definitively explains how to properly calculate the best subsonic filter frequency for a ported enclosure and subwoofer.
I searched here, BCAE, google, and every other car audio forum I could find and came up empty handed.
The subwoofer I would like to use as an example is the JL 6W0-4 in JL's recommended ported enclosure.
Driver and enclosure specs here... LINK
Thanks ahead of time for any help.
DYohn 
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Joined: April 22, 2003
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Posted: September 03, 2006 at 3:28 PM / IP Logged  
Set your subsonic filter at or just below your port tuning frequency.
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kfr01 
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Posted: September 03, 2006 at 3:32 PM / IP Logged  
DYohn is right, of course.
If you want to see how a subsonic filter affects excursion and frequency response, they can be modeled in WinISD.
Cheers
New Project: 2003 Pathfinder
luckydevil 
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Posted: September 03, 2006 at 3:41 PM / IP Logged  
kfr01 wrote:
DYohn is right, of course.
If you want to see how a subsonic filter affects excursion and frequency response, they can be modeled in WinISD.
Cheers
GOOD STUFF! I wasn't aware of that in WinISD.
Thanks guys!

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