bdks Posted April 17, 2009 Report Share Posted April 17, 2009 I have 2 DC Level 4 Xl 18's and the box will be about 15 C.F Tuned to 32 Hz.. How much port area would be best for the 18's? Thanks, Quote Link to comment Share on other sites More sharing options...
loganuf Posted April 17, 2009 Report Share Posted April 17, 2009 usually the rule of thumb is 16 cubic inches per cubic ft., so roughly 240 cubic inches of port area Quote 2000 Eddie Bauer Expedition: Alpine CDA 9883 2x 18" DC lvl 4 D2 10.7 cu ft box 33hz knu 1/0 wire amp: Kicker ZX2500.1 Kinetik Link to comment Share on other sites More sharing options...
Noobtastic14 Posted April 17, 2009 Report Share Posted April 17, 2009 I'm thinking something around 225sqin got a pic of the design? -Drew Quote I am a United States Military Arts and Crafts Professional. Sand it off, Paint it on. uhoh_45 said: dont be a pussy P give the jeep to drew Link to comment Share on other sites More sharing options...
bdks Posted April 17, 2009 Author Report Share Posted April 17, 2009 No I dont but the Subs will be facing Foward and the port will be up along the back . Quote Link to comment Share on other sites More sharing options...
Torres Posted April 18, 2009 Report Share Posted April 18, 2009 usually the rule of thumb is 16 cubic inches per cubic ft., so roughly 240 cubic inches of port area rule of thumb is ~12-16 Quote Link to comment Share on other sites More sharing options...
loganuf Posted April 18, 2009 Report Share Posted April 18, 2009 rule of thumb is ~12-16 yea i tend to use the higher end of port area Quote 2000 Eddie Bauer Expedition: Alpine CDA 9883 2x 18" DC lvl 4 D2 10.7 cu ft box 33hz knu 1/0 wire amp: Kicker ZX2500.1 Kinetik Link to comment Share on other sites More sharing options...
bdks Posted April 18, 2009 Author Report Share Posted April 18, 2009 So I should be good with 240SQ Inches.. Quote Link to comment Share on other sites More sharing options...
loganuf Posted April 18, 2009 Report Share Posted April 18, 2009 So I should be good with 240SQ Inches.. yea that should be good for the 15 cu. ft Quote 2000 Eddie Bauer Expedition: Alpine CDA 9883 2x 18" DC lvl 4 D2 10.7 cu ft box 33hz knu 1/0 wire amp: Kicker ZX2500.1 Kinetik Link to comment Share on other sites More sharing options...
fast85_gt Posted April 18, 2009 Report Share Posted April 18, 2009 rule of thumb is ~12-16 is this 12~16 rule for gross or net Quote Link to comment Share on other sites More sharing options...
OBI Posted April 18, 2009 Report Share Posted April 18, 2009 (edited) Its for net. Edited April 18, 2009 by OBI Quote Link to comment Share on other sites More sharing options...
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