nCOMP1337 Posted August 2, 2013 Report Share Posted August 2, 2013 Alright, I just typed all this up and the browser closed out, saving the title to the new thread but nothing else. So Ill make this shorter this time. Subs: Sundown X 12s powered by powerbass 3k at 1ohm My first major build, I want a 4th order, got some tips from Singer at slamology. He said try to stick to a 1:1 ratio with around 1cuft per sub, this will help when pressurizing the cabin. He said more but I cant remember it all sadly, LOL. I do not know how to tune these, so I will give the dimensions I have for the sealed and ported sections separately, and then hopefully someone can let me know what I did wrong, what I can change and some advice to make it work for the application I want this enclosure for. Sealed: 26.5 x 14.5 x 12 (internal) | 2.67 cuft I do not know the woofer displacements, but the zv4s are .12, so I estimated .3 displacement for the woofers and bracing altogether, I am prolly a little high on that number. But that would give me around 2.37 cuft for the sealed section. Whether the subs are mounted inside the sealed section or not doesnt bother me, but with the high surround these subs have, I would be worried about the surround rubbing if they werent mounted properly when reverse. Ported: Now this one I used Torres calc for, and I calculated it like a typical ported enclosure. Here is what Torres gave me. 28 x 16 x 19.25 (external) with 11 x 4 x 14.5 for the port giving a gross volume of 3.95cuft with a net volume of 3.31cuft, and a tuning of 49.48 With current dimensions of both sections and if all was done right, the current ratio seems to be more like 1.4:1 Any help is appreciated, Id like to get this 4th order design together so I can begin building it and get my system together finally, its been too long of a process. Link to comment Share on other sites More sharing options...
ToNasty Posted August 2, 2013 Report Share Posted August 2, 2013 Are you going for sq or spl? ***Super Sellers List***http://www.stevemeadedesigns.com/board/topic/25829-super-sellers-buyers Link to comment Share on other sites More sharing options...
nCOMP1337 Posted August 3, 2013 Author Report Share Posted August 3, 2013 more towards SPL, the subs are the Sundown X 12s, so they are great for the lows, so im hoping to utilize them as best I can in a 4th order, they will be on a powerbass 3k. i initially had that info in the post before my browser crashed, sorry i forgot to add it back in Link to comment Share on other sites More sharing options...
nCOMP1337 Posted August 7, 2013 Author Report Share Posted August 7, 2013 Can any one offer any help? Link to comment Share on other sites More sharing options...
nCOMP1337 Posted August 7, 2013 Author Report Share Posted August 7, 2013 i put everything into winisd, and it gave me almost the same tuning, but with smaller volume for each chamber. The ratio turned out to be 1.3:1 in winisd and 1.4:1 when I did it myself. I assuming im not far off, but i may just have to risk losing a bit of money and test it out. Link to comment Share on other sites More sharing options...
DylanBunch Posted August 7, 2013 Report Share Posted August 7, 2013 if youre trying to get spl as in competing and trying to get a high score shoot for a 3 ported:1sealed ratio 2006 Ford Explorer 2 Team AA/Sundown 15s 6th order Ct Sounds 7k 4 PRV Mr500 8s Rockford p1000-2 Team Subsonic Lows Link to comment Share on other sites More sharing options...
nCOMP1337 Posted August 7, 2013 Author Report Share Posted August 7, 2013 i do prefer spl but im not worried about competing much or scoring high. id rather focus on low end bass, yet still musical over a decent bandwidth. due to it going into a car, singer suggested not having such a large ratio as it would make it harder to pressurize the cabin or something like that, i think thats why he suggested i do a 1:1 ratio for it, so thats why i was trying to keep it close to that ratio. It would have been easier to listen and remmeber what he was saying if we werent next to JPs tahoe getting demoes, LOL Link to comment Share on other sites More sharing options...
Joe X Posted August 7, 2013 Report Share Posted August 7, 2013 Tuning is calculated with the net volume of the ported chamber, 2:1 and up will peak hard around tuning frequency. Link to comment Share on other sites More sharing options...
OldsBoomer Posted August 7, 2013 Report Share Posted August 7, 2013 What is this going in? Suburban Coming Soon Link to comment Share on other sites More sharing options...
nCOMP1337 Posted August 7, 2013 Author Report Share Posted August 7, 2013 2005 dodge status Link to comment Share on other sites More sharing options...
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