3 subs, different airspace

I am building a custom sub box for 3 jl audio subs and I was planning on separating each sub so that each sub has its own chamber for more stability, however, when building the box, the two sub on the left and right are going to have the same airspace while the sub in the middle will not.  The subs on the left and right are going to have more airspace because i am shaping the sides according to the trunk with fiber glass, whereas the sub in the middle is just going to be a basic square and will have less airspace than the left and right sub chambers.  My question is, will the subs perform wierd because each sub might have a different box volume?   Keep in mind, I will be bridging them and running them either 4 or 1 ohm mono, so all the subs will be getting the same signal, not separate ones. mUch thanks...

Hey man, i'm not a pro (obviously), but if i were in that situation, i'd fill the middle chamber with some polyester fiberfill, to trick the sub into thinkin its in a bigger space. then, all three should have similar airspace, and all should perform about the same. But, i'd wait for DYon, custom, or forbidden to write ya, they know their stuff alot better than i do.

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1990 Honda Civic HB:
Clarion DXZ545MP H.U.
2- 6.5" Power Acoustik interiors
Diamond Audio 600.1 amp
Diamond Audio 15" M6MKII
Pyramid PB881X 4 CH. Amp

This is not a good idea, it is recommended that yes all the subs have the same power from the same amp, or even use the same airspace. I prefer using separate chambers for my subs as if there is a failure of one sub, at least I can still listen to my tunes while the other sub is sent away. My suggestion for you is this. Build the box as one large box for now, glass away on the sides as much as you like, matter of fact, I would resin the entire inside of this box (make sure to do this). Once this is done, take it out of the vehicle and fill it with water, this does two things, if water leakes, air leaks. The second thing that can be done is to calculate airspace. Once you have the proper airspace calculated, the gross volume, you can subtract from that the cubic volume of the dividers you will put in to separate the chambers, this will be the net volume. If the center box was going to be a basic cube or rectangle this is very easy, take the net cubic volume and divide by 3. Make the center chamber to the volume requirement of that last calculation. This should get you started on the right path, confused? post it on up and someone will answer it.

For the math

l x w x h = cubic inches = cubic foot

12 x 12 x 12 = 1728 cu.in. = 1 cu.ft

28.32 litres of water = 1728 cu.in. = 1 cu.ft.

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Top Secret, I can tell you but then my wife will kill me.

damn, how come i didnt think of that? lol.

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1990 Honda Civic HB:
Clarion DXZ545MP H.U.
2- 6.5" Power Acoustik interiors
Diamond Audio 600.1 amp
Diamond Audio 15" M6MKII
Pyramid PB881X 4 CH. Amp