Keveeno Posted April 11, 2013 Report Share Posted April 11, 2013 I have an fi sp4 18 fully loaded. Looking to build a 6th order bandpass. Room is not issue. Just need help with the airspace and ports calculation for a decently sized 6th order. Sub will be played off Aq3500.1d at 1 ohm. Thanks! Link to comment Share on other sites More sharing options...
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