Rogers Posted May 31, 2009 Report Share Posted May 31, 2009 ok so since i traded my type s's for 2 type r's im going to be buying 2 more and i might as well get my box design out of the way... an eclosure for 4 12" type r's so the type r's need 1.3cuft net each... so thats 5.2 net alltogether im going to do (4) 4" round ports x 18" long = .44cuft displacement should be 35ish hz the driver displacement is .07cuft per sub = .28cuft so i end up with a total displacement = .72cuft displacement so my gross enclosure volume needs to be = 5.9cuft so im going to do subs up ports back again... so im thinking my demensions will be... 33"wide x 15"tall(double baffle) x 27" long making my internal deminsions 31.5"wide x 12.75"tall x 25.5"long =5.92 gross let me know if im off..... http://www.stevemeadedesigns.com/board/topic/79921-rogers-700-dream-car-update-page-17-a-wall/?p=2335774 93 Saturn SC2My system4 SA-15's Walled 2 Cerwin-Vega S2000's 3 Kinetik Hc2000's Dual 200amp alts. you guys done with the peepee touching contest or do I need to end it? Link to comment Share on other sites More sharing options...
bkolfo4 Posted May 31, 2009 Report Share Posted May 31, 2009 You got it. . . Current system: 1997 Blazer - (4) Customer Fi NEO subs with (8) American Bass Elite 2800.1s Previous systems: 2000 Suburban - (4) BTL 15's and (4) IA 40.1's = 157.7 dB at 37 Hz. 1992 Astro Van - (6) BTL 15's and (6) IA 40.1's = 159.7 dB at 43 Hz. Link to comment Share on other sites More sharing options...
Rogers Posted June 1, 2009 Author Report Share Posted June 1, 2009 You got it. . . you taught me man....thanks! i havent decided if im going with this enclosure or if im going to do a slotvent, if i do a slotvent im not sure how wide to make my vent... http://www.stevemeadedesigns.com/board/topic/79921-rogers-700-dream-car-update-page-17-a-wall/?p=2335774 93 Saturn SC2My system4 SA-15's Walled 2 Cerwin-Vega S2000's 3 Kinetik Hc2000's Dual 200amp alts. you guys done with the peepee touching contest or do I need to end it? Link to comment Share on other sites More sharing options...
bkolfo4 Posted June 2, 2009 Report Share Posted June 2, 2009 You will see the general rule 12-16 sqin of port per cuft of enclosure. This normally works out, but port area is really determined by the air velocity moving through the port. If I have a 7 cuft box for an 18" driver and I put in a low excursion driver and a 500 watt amp, that is not going to require as much port area as an 18" BTL on 4000 watts. . .Not that it will hurt to have more port area on the low power setup, it is just not a must if space is an issue. I use this for my box designs: http://www.carstereo.com/help2/Articles.cfm?id=31 Slot ports are as easy to calculate as round - same method - just watch out when the length gets the port wall too close to the back wall. Brian Current system: 1997 Blazer - (4) Customer Fi NEO subs with (8) American Bass Elite 2800.1s Previous systems: 2000 Suburban - (4) BTL 15's and (4) IA 40.1's = 157.7 dB at 37 Hz. 1992 Astro Van - (6) BTL 15's and (6) IA 40.1's = 159.7 dB at 43 Hz. Link to comment Share on other sites More sharing options...
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