i want to put more 2 more subs

[Stephen616]

i have a 2012 Chrysler 200 with a small trunk I have 2 15" power acoustic mofo-152x they call for 3sqft of volume each so I built a 6 sqft box but I want to put 2 more but cant make the box any bigger. I have room to place 2 more on the top but don't how that would work or if I can without damaging the subs or what options I have if any. 

[fmedina]

9 minutes ago, Stephen616 said:

i have a 2012 Chrysler 200 with a small trunk I have 2 15" power acoustic mofo-152x they call for 3sqft of volume each so I built a 6 sqft box but I want to put 2 more but cant make the box any bigger. I have room to place 2 more on the top but don't how that would work or if I can without damaging the subs or what options I have if any. 

if theres no room then theres no room man. i you cant fit a 12cu ft enclosure for four 15s after all displacements then a  partial wall might be necessary.  i wouldnt cram them in a too small of a box. how much more room exactly do you have. give us max dimensions you have to work with.  

[ShadeTreeMechanic]

Two subs in the right box will probably be louder than four subs in the wrong box.

[Ron36]

You could probably squeez 4 tens in there but no way 15's, 4 Sundown ZV5-10's would be killer 1.5ft3 per sub.

[Stephen616]

the max dimensions I got are 32 x 36 x 16 which is 8.8ft3 the 2 I have in there sound good but was wanting to get louder sounds great inside but not loud or hard enough lol always want more I might have to just play with the 2 I got in different boxes