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Subsonic filter

Old 03-31-2015, 05:37 AM
  #1  
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Subsonic filter

I have an 8 inch ported sub with an Alpine sub amp that has a fixed subsonic filter at 15hz. I would like to get an inline filter to get the cut off at 30hz. Does it need to be active or passive?
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Old 04-02-2015, 02:17 PM
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Either works but active works better.
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