Sectioning off a dual subwoofer box, and Airspace

[rhodsies07]

Hello all! I'm a newb to the site, and a semi-newb to car audio. A few months back though, I started building a custom subwoofer box to fit under the seat of my 2004 dodge ram 2500 quad cab. It's going to house 2 Memphis M3's. It's taken me so long, and I'm almost done with it. I've had this question for a while, but since I'm just about done with the box, I'm wanting to get it answered before I go to put all of my pieces together. My question is this, the subs currently are not going to be sectioned off in the box, is this going to cause me problems? Will it hurt my subs? I haven't actually gotten measurements to see what my airspace is vs. what I need, because I had these subs in a turndown box that went in a 98 Chevy, and it seems that they'll be getting big plenty air compared to that. Also I'll just have to explain this because I don't have any photos of the build yet, but I've also built a "bubble," that comes out from under the seat in the center, and towers up to the top of the fold out center seat of the front of the cab. I did this for more airspace thinking it would help the subs seeing as how they are not shallow mount subs, and the more air the better. Am I wrong on that? Guess that was actually 2 questions I needed answered. I will try to get some pics if will help. Thank yall for reading, and any help would be greatly appreciated!

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[LosIsATool 5,000+ posts]

Sharing airspace is completely fine

It's the net airspace that matters.

 

[rhodsies07]

Okay, so if sharing is not gonna hurt anything, will I need to make sure I have enough space for each speaker? I mean lets say that each speaker's optimal airspace is 2 cu. ft., does that mean I'd need to have 4 cu.ft. total, or will 2 cu.ft. shared be okay?

 

[LosIsATool 5,000+ posts]

4 cubes after all displacements.

 

[rhodsies07]

Okay, what will I run into if I'm over my optimal amount of space?

 

[LosIsATool 5,000+ posts]

Better preformace.

 

[LosIsATool 5,000+ posts]

Most of the factory recommend specs are to small by a half cube or more.

 

[rhodsies07]

Awesome thanks so much!