rsfm089 Posted April 27, 2019 Report Share Posted April 27, 2019 As of right now i am running two dc xl m2s on 2 aq s1 2250s. My box is 20X16x32 i think. (its snowing) I lose control over the cone when there is quick changes from bass tones almost like it is bottoming out. This happens at all different tones. First thing is i got a different vechical and have a ton more room.(suv) Would going to a fourth oder help with this? Amp is set with a dd1 and no clipping. The other question i have is there a big sound difference between a ported box and a fourth? And how hard is it to build a fourth order? If there is any other info i can supply to help i can get it. thank you. Link to comment Share on other sites More sharing options...
Triticum Agricolam Posted April 27, 2019 Report Share Posted April 27, 2019 Can you tell us more about your setup? How big is your sub? What is your box tuned to? What are the port dimensions? Do you know what the box net volume is? Compared to a ported box, a 4th order bandpass is going to have more output in the 40-50 Hz range, because that is where they are generally tuned, where as ported boxes are generally tuned to the low 30s. A 4th order BP box will also have more output down below 30 hz since that is where ported boxes begin to unload. It definitely going to sound different. They aren't really any more difficult to build than a ported box, however I would recommend you make it so you can change the port specs after you have it built, their performance is more sensitive to their tuning frequency than a ported box is. "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...
rsfm089 Posted April 27, 2019 Author Report Share Posted April 27, 2019 i was trying to look up the post for my box. you actually helped me with the design. But i think it was under jeff146.4. 12 inch subs the box is tuned to 32 i believe. if i could find that post i could tell you the port and volume i will keep looking. also not looking to chase numbers just like loud bass. Link to comment Share on other sites More sharing options...
rsfm089 Posted April 27, 2019 Author Report Share Posted April 27, 2019 @Triticum Agricolam found it. box net=3 ft cubed box gross=5.42 ft cubed port vol.=1.68 ft cubed port area=64.13 in cubed port area per ft=21.36 in cubed port ratio=1:2.84 tuned to 34hertz Hope this helps if nothing else i can just put this box in the new vechical. Just wondering if it would be more efficient to build a new box. The suv is a 2014 dodge journey Link to comment Share on other sites More sharing options...
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