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Audio Control Subsonic filter modules

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Old 04-17-2009, 11:07 PM
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Thumbs up Audio Control Subsonic filter modules

Anybody build there own AudioControl filters modules?
The audio shops that sell them around here charge $30 for a module, so I finally built my own to day. Total parts cost $1.57, but more like $4 with shipping cost. I could of made it for probably 60 cents, but I used the good stuff!

255 k-ohm 1/4w +1% Metal Film Resistors





This module will give my subs a 18db/octave roll off at 28Hz
Old 04-17-2009, 11:27 PM
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Can you elaborate on what it does?
Old 04-17-2009, 11:54 PM
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It filters out the bass from the set frequency (28hz) on down.
Not really important if you subs are in a sealed box, but for subs in a ported box it's very important to have a subsonic filter close in frequency to the frequency the port is tuned to, to help prevent speaker damage.
Old 05-08-2009, 12:10 PM
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I need to construct one of these myself here now. I want to go to a ported box...

Is there anyplace that you could point me to read up on how to build one?
Old 05-08-2009, 04:21 PM
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Nicely done!!!
Old 05-08-2009, 10:40 PM
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Originally Posted by 02NBMWS6
I need to construct one of these myself here now. I want to go to a ported box...

Is there anyplace that you could point me to read up on how to build one?
This is module is only for AudioControl 3rd order high/low pass filter, this is a active (before power amp.), not a passive filter(after the power amp.). I don't know of any other campany that builds their filter modules like this, but I could be wrong.



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