ShadeTreeMechanic Posted April 4, 2017 Report Share Posted April 4, 2017 The specs they give you with the sub are the Thiele / Small parameters. So basically you take the T/S parameters and plug them into a calculator program to find the optimal box for whatever you want to do. Two different programs come to mind and they are both free to download. One is called Torres Box Tuning Calculator and the other is called Winisd. 91 C350 Centurion conversion ( Four Door One Ton Bronco) 250A Alternator (Second Alternator Coming Soon) G65 AGM Up Front / Two G31 AGM in Back Pioneer 80PRS CT Sounds AT125.2 / CT Sounds 6.5 Strato Pro component Front Stage CT Sounds AT125.2 / Lanzar Pro 8" coax w/compression horn tweeter Rear Fill FSD 5000D 1/2 ohm (SoundQubed 7k Coming Soon) Two HDS315 Four Qubes Each 34hz (Two HDC3.118 and New Box Coming Soon) Link to comment Share on other sites More sharing options...
bolanorthhighlands Posted April 4, 2017 Author Report Share Posted April 4, 2017 I downloaded both last night. still trying to find a couple more specs on my subs My 2002 Kia Spectra LS My YouTube Channel Link to comment Share on other sites More sharing options...
bolanorthhighlands Posted April 9, 2017 Author Report Share Posted April 9, 2017 When I input my t/s parameters in winisdpro. The program said my specs were inconsistent. I had to erase one of the numbers and let it auto fill. But I can't find xmax. Can anyone guess the xmax?(this is what my sub looks like in the inside(without the damage). Do I really need the xmax in winisdpro? My 2002 Kia Spectra LS My YouTube Channel Link to comment Share on other sites More sharing options...
Guest Posted April 9, 2017 Report Share Posted April 9, 2017 On 4/3/2017 at 5:28 PM, bolanorthhighlands said: I have a box with (4)8" speakers. I want to make my (4)8" box into a (2)12" box. goddammit bola no Link to comment Share on other sites More sharing options...
bolanorthhighlands Posted April 10, 2017 Author Report Share Posted April 10, 2017 I had the (4)8s box hooked up to my computer with a Sony xm-250. I had the two 6" holes laying face down on the carpet(making it sealed). But my cousin gave me a Sony sa-wa2500 sub. I had (4) gravity warzones. I sold two warzones. Now I only have 2 warzones. Then I ordered two more warzones. I still haven't gotten the subs I ordered. I'll probably get my money bacc. And end up with (2)12s. My 2002 Kia Spectra LS My YouTube Channel Link to comment Share on other sites More sharing options...
bolanorthhighlands Posted April 17, 2017 Author Report Share Posted April 17, 2017 I guess it would depend on the subwoofer displacement(I'm still not sure on my subs displacement). The whole box is made out of .75" mdf. only the front baffle is 1" thick. It's for two 12s. What I'm trying to ask is, what is my prefab box tuned to?(this is the box I'm using now) My 2002 Kia Spectra LS My YouTube Channel Link to comment Share on other sites More sharing options...
Triticum Agricolam Posted April 17, 2017 Report Share Posted April 17, 2017 So the ports on that box and 7/8" wide where they exit the front, but are 4.25" wide after they turn the corner at the back of the box? Am I interpreting your drawing correctly? "Nothing prevents people from knowing the truth more than the belief they already know it.""Making bass is easy, making music is the hard part."Builds: Link to comment Share on other sites More sharing options...
bolanorthhighlands Posted April 17, 2017 Author Report Share Posted April 17, 2017 Yes that is right. It's a prefab box I'm using. I bought it like that. My 2002 Kia Spectra LS My YouTube Channel Link to comment Share on other sites More sharing options...
Triticum Agricolam Posted April 17, 2017 Report Share Posted April 17, 2017 45 minutes ago, bolanorthhighlands said: Yes that is right. It's a prefab box I'm using. I bought it like that. OK, wow. The amount of fail in prefab boxes never ceases to amaze me. So based on those numbers and assuming .1 cu ft for sub displacement that box should have about 1.2 cu ft net volume per side, tuned to around 42 Hz, with a pathetic amount of port area (just over 11 sq in). "Nothing prevents people from knowing the truth more than the belief they already know it.""Making bass is easy, making music is the hard part."Builds: Link to comment Share on other sites More sharing options...
bolanorthhighlands Posted April 17, 2017 Author Report Share Posted April 17, 2017 Damn. I knew 35hz didn't sound right. Thanks My 2002 Kia Spectra LS My YouTube Channel Link to comment Share on other sites More sharing options...
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