fast85_gt Posted June 4, 2009 Report Share Posted June 4, 2009 (edited) my box after dissplacments is 8.40 the .40 has put my tuning to low around 29.75hz i need to be at 8cubes and around 31 to 32hz ill be adding a 45 degree at the back of the port it will be around 7"x 34.5" will this be to much of a 45 and my port is 4"x25"x21.5"deep can someone help the box is 14.5Hx34.5Wx34.5D inside messurments Edited June 4, 2009 by fast85_gt Quote Link to comment Share on other sites More sharing options...
fast85_gt Posted June 4, 2009 Author Report Share Posted June 4, 2009 where is all the box experts at lol? i thought this was smd and no one can answer a simple ? well not simple for me Quote Link to comment Share on other sites More sharing options...
Noob_On_Droid Posted June 4, 2009 Report Share Posted June 4, 2009 Adding a 45 to the inside of your port corner will not lower the volume of enclosure the woofer will see. It sounds like you need to bust out some 2x4 bracing to eat up a few tenths of a cubic foot Quote Link to comment Share on other sites More sharing options...
sound xtreme Posted June 4, 2009 Report Share Posted June 4, 2009 unless you are doing some hardcore SPL (and looking at your tuning, your not) you wont notice the difference between those frequencies. I have seen weather changes effect frequencies more than that. i always 45 the woofer side of the enclosure, but like ^^^^said, add some bracing. How much does this woofer displace?? Quote 1997 Astro front:6 sets of T3 componets Subs: 8 level 5 18"s (building 6th order BP) Amps: 4 really big ones (totalling just shy of 50K) Batts: Alt: Ohio Generator 1996 Chevy Suburban Sub amp: A fifth really big amp Subwoofer: 2-15" DC Level 4 XL Batts: C&D high rate--(x4) Link to comment Share on other sites More sharing options...
97maxima Posted June 4, 2009 Report Share Posted June 4, 2009 Adding a 45 to the inside of your port corner will not lower the volume of enclosure the woofer will see. It sounds like you need to bust out some 2x4 bracing to eat up a few tenths of a cubic foot yep adding it will actually keep the port size consistent(sp) Quote American Bass*DC Power Link to comment Share on other sites More sharing options...
fast85_gt Posted June 4, 2009 Author Report Share Posted June 4, 2009 unless you are doing some hardcore SPL (and looking at your tuning, your not) you wont notice the difference between those frequencies. I have seen weather changes effect frequencies more than that.i always 45 the woofer side of the enclosure, but like ^^^^said, add some bracing. How much does this woofer displace?? each woffer dissplaces .31 then its dbl baffel and i dont know how mch the extra baffel takes up and i have alot of braceing in there an on the calc. it says if i add a 8" 45 to the woffer side oppisit of port opening it will take up .44cf but will that be to big of 45 but it will get me closer to 8 cubes and 32hz please help Quote Link to comment Share on other sites More sharing options...
sound xtreme Posted June 4, 2009 Report Share Posted June 4, 2009 well instead of just angling the one side, and all the corners. i normally use 4" pvc and cut it in quarters screw it into place, then use duraglass to smooth the edges Quote 1997 Astro front:6 sets of T3 componets Subs: 8 level 5 18"s (building 6th order BP) Amps: 4 really big ones (totalling just shy of 50K) Batts: Alt: Ohio Generator 1996 Chevy Suburban Sub amp: A fifth really big amp Subwoofer: 2-15" DC Level 4 XL Batts: C&D high rate--(x4) Link to comment Share on other sites More sharing options...
fast85_gt Posted June 4, 2009 Author Report Share Posted June 4, 2009 thanks anyone else ?I still need help will taking up the .44cubes in my box to make it 8 cubes total will that bring my tuning up Quote Link to comment Share on other sites More sharing options...
fast85_gt Posted June 5, 2009 Author Report Share Posted June 5, 2009 anyone? Quote Link to comment Share on other sites More sharing options...
testtones Posted June 5, 2009 Report Share Posted June 5, 2009 according to WinISD 8 ft^3 with a port 4" x 25" x 21.5" deep the tuning will be 33.57 Hz Quote Link to comment Share on other sites More sharing options...
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