Two 12's in shared or seperated sealed chamber?

[Tragedy116 10+ year member]

I have purchased two 12 inch magnum D2's and have thrown them in a 3.2 cubic foot sealed bo that is a sealed chamber due to space in my trunk. I heard many differences about having subs in either sealed or seperated sealed chambers. What are the main differences? What are the advantages or disadvantages of having a shared chamber sealed box over a seperated chamber sealed box?

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[jemorgan85 10+ year member]

I have purchased two 12 inch magnum D2's and have thrown them in a 3.2 cubic foot sealed bo that is a sealed chamber due to space in my trunk. I heard many differences about having subs in either sealed or seperated sealed chambers. What are the main differences? What are the advantages or disadvantages of having a shared chamber sealed box over a seperated chamber sealed box?

In a shared chamber, the two woofers will each fight each other for air, and it will seem as if they are not moving together. A shared sealed chamber is generally a bad choice as it is hard on your woofers.

 

[meanman101 10+ year member]

In a shared chamber if 1 sub goes out the other will probably sound bad because it will be left with double the recommended space. In seperate chambers if 1 sub goes out the other will still pump out the bass until you replace the other sub.

 

[Dupuis 10+ year member]

Am I correct in saying that this is not true with ported boxes? You want both subs in the same chamber with ported right?

 

[jemorgan85 10+ year member]

Am I correct in saying that this is not true with ported boxes? You want both subs in the same chamber with ported right?

If you want to put two chambers in a ported box you need two ports obviously.

 

[BSwithTF]

If you want to put two chambers in a ported box you need two ports obviously.

In my last system, I had 2 12" Kicker Free-Air in a vented box. The vent was in the center of the box, with openings at the back of the vent into each chamber. Was this the wrong way to do it?

 

[Dupuis 10+ year member]

Would you want to put any stuffing in a ported box or leave it empty?

 

[meanman101 10+ year member]

It depends. You use stuffing to make the subs act as if the box was larger. If the box is made to the subwoofer specs then you dont need to fill.

 

[Dupuis 10+ year member]

Thanks, that's what I needed. I about to start my box. (Ported to the right volume)

 

[Afboy143 10+ year member]

Dupuis, do not i repeat DO NOT stuff a ported box. Yes, stuffing makes the subwoofer think its in a bigger box but stuffing always eliminated the back wave. The backwave is what makes the port on a sub box work so well. if u eliminated this wave it would get as loud. Only stuff a sealed box because in a sealed box u want to get rid of the back wave because all it does is create nonsence pressure in the box preventing the subwoofer to move air at its full potential

 

[Afboy143 10+ year member]

Would not get as loud****

 

[Dupuis 10+ year member]

That makes a lot of sense, the stuffing would defeat the purpose of a ported box in terms of are flow. What about lineing the ported box with a damping material? Would this again effect air flow to much or would this help with any booming noises?