rab Posted December 15, 2010 Report Share Posted December 15, 2010 Ok guys this is the deal i want to buy a Fi 15" sub and i already have a box build but i cant figure out which sub would be better for the box. the box is 40l x 20w x12.5h and the port is 56 square inches of opening and 23" deep.can someone also help me figuring out what this box is tuned to.thanks note:box is build in 3/4 mdf Quote Link to comment Share on other sites More sharing options...
NDMstang65 Posted December 15, 2010 Report Share Posted December 15, 2010 Need the port opening dimensions as well. You can calculate volume of enclosures here. You then have to do length x width x height for your port and subtract that from the volume. http://www.the12volt.com/caraudio/boxcalcs.asp#rec Quote Authorized Ascendant Audio Dealer! Message me for information. If you can't explain it simply, you don't understand it well enough -Albert Einstein "I have a plausible excuse for not liking you. And you know why." Link to comment Share on other sites More sharing options...
rab Posted December 15, 2010 Author Report Share Posted December 15, 2010 Need the port opening dimensions as well. You can calculate volume of enclosures here. You then have to do length x width x height for your port and subtract that from the volume. http://www.the12volt.com/caraudio/boxcalcs.asp#rec ok so it looks like i have a 4.53 cf internal box not including displacements tuned around 35hz.so the question is which fi 15" sub would be better option for this box the ssd or the Q series? Quote Link to comment Share on other sites More sharing options...
NDMstang65 Posted December 15, 2010 Report Share Posted December 15, 2010 Depends on how much power you plan on running... You have to calculate your displacements as well. Either post the dimensions or use the basic geometry formula of length x width x height / 1728 to figure out how much volume the port is taking up. Quote Authorized Ascendant Audio Dealer! Message me for information. If you can't explain it simply, you don't understand it well enough -Albert Einstein "I have a plausible excuse for not liking you. And you know why." Link to comment Share on other sites More sharing options...
NDMstang65 Posted December 15, 2010 Report Share Posted December 15, 2010 Depends on how much power you plan on running... You have to calculate your displacements as well. Either post the dimensions or use the basic geometry formula of length x width x height / 1728 to figure out how much volume the port is taking up. Quote Authorized Ascendant Audio Dealer! Message me for information. If you can't explain it simply, you don't understand it well enough -Albert Einstein "I have a plausible excuse for not liking you. And you know why." Link to comment Share on other sites More sharing options...
rab Posted December 16, 2010 Author Report Share Posted December 16, 2010 according to my calculations i have 3.79 cf left after taking out the port displacement.so at the end i will have around 3.5 cf considering the sub displacement be 0.29 cf.as of power i have 9 amps ranging from 1k- 12k so power is not a problem. i have a box thats 3.5 cf after displacements tuned to 37hz what fi 15" sub would fit better for this box? Quote Link to comment Share on other sites More sharing options...
NDMstang65 Posted December 16, 2010 Report Share Posted December 16, 2010 I wouldn't run any sub tuned higher than 33Hz daily driving...you are going to have to turn your subsonic filter way up so you do not shred the sub below tuning. Quote Authorized Ascendant Audio Dealer! Message me for information. If you can't explain it simply, you don't understand it well enough -Albert Einstein "I have a plausible excuse for not liking you. And you know why." Link to comment Share on other sites More sharing options...
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