jack Posted January 6, 2008 Report Share Posted January 6, 2008 (edited) any links to a site that you can input your box area and port area and give the desired tuning it will give you the length etc... or the formula would help also. i know that it is 12-16 square inches of port area per cube but dont know how to get the length. Edited January 6, 2008 by jack Quote http://www.stevemeadedesigns.com/board/ind...showtopic=29213 "sleeper build" (1) DC AUDIO Level4XL 10 (2) PowermasterD2700 batteries ALL FOR SALE TEAM DC AUDIO TEAM DIRTFLOORPOOR Link to comment Share on other sites More sharing options...
joey2714 Posted January 7, 2008 Report Share Posted January 7, 2008 copied from another website... (dont remember where lol) This formula is also from "The Loudspeaker Design Cookbook". It tells you how long you need to make the vent. Fb - is the tuning frequency of your enclosure in Hertz. Lv - is the length of your port in inches. R - is the inside radius of your vent tube. Vb - is the internal volume of your enclosure in cubic inches. To convert cubic feet to cubic inches, multiply by 1728. If you want to use multiple ports, divide your enclosure volume by the number of ports you want to use, then use the result of this calculation as your Vb in the formula below to find out how long each port should be (a tip from JL Audio™). If you want to calculate square vents, the formula below will give you the value of R to use in the formula above. In the formula above, a is the area of your square vent (height x width), and (Pi) is approximately 3.141592. Quote play Moola.com its actually fun and free... click here to join Money games! its just games with free money! Link to comment Share on other sites More sharing options...
jack Posted January 7, 2008 Author Report Share Posted January 7, 2008 copied from another website... (dont remember where lol) This formula is also from "The Loudspeaker Design Cookbook". It tells you how long you need to make the vent. Fb - is the tuning frequency of your enclosure in Hertz. Lv - is the length of your port in inches. R - is the inside radius of your vent tube. Vb - is the internal volume of your enclosure in cubic inches. To convert cubic feet to cubic inches, multiply by 1728. If you want to use multiple ports, divide your enclosure volume by the number of ports you want to use, then use the result of this calculation as your Vb in the formula below to find out how long each port should be (a tip from JL Audio™). If you want to calculate square vents, the formula below will give you the value of R to use in the formula above. In the formula above, a is the area of your square vent (height x width), and (Pi) is approximately 3.141592. well that just cofused the shit out of me or maybe its cus ive been drinking since 10am dont know. thank you joey. how about a box design site that does tha calc itself if you just plug the numbers spreadsheet style? Quote http://www.stevemeadedesigns.com/board/ind...showtopic=29213 "sleeper build" (1) DC AUDIO Level4XL 10 (2) PowermasterD2700 batteries ALL FOR SALE TEAM DC AUDIO TEAM DIRTFLOORPOOR Link to comment Share on other sites More sharing options...
joey2714 Posted January 7, 2008 Report Share Posted January 7, 2008 give me a min.. Quote play Moola.com its actually fun and free... click here to join Money games! its just games with free money! Link to comment Share on other sites More sharing options...
joey2714 Posted January 7, 2008 Report Share Posted January 7, 2008 2nd calc on this page Quote play Moola.com its actually fun and free... click here to join Money games! its just games with free money! Link to comment Share on other sites More sharing options...
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joey2714 Posted January 7, 2008 Report Share Posted January 7, 2008 exact same one lol... nice find i love that calc Quote play Moola.com its actually fun and free... click here to join Money games! its just games with free money! Link to comment Share on other sites More sharing options...
jack Posted January 7, 2008 Author Report Share Posted January 7, 2008 thanks guys that shit is awesome Quote http://www.stevemeadedesigns.com/board/ind...showtopic=29213 "sleeper build" (1) DC AUDIO Level4XL 10 (2) PowermasterD2700 batteries ALL FOR SALE TEAM DC AUDIO TEAM DIRTFLOORPOOR Link to comment Share on other sites More sharing options...
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