[MYCARcamry]

is therre any way i could fix this problem if i buy another box the same thing will happen two 15's aint no joke is therre anyway i can fix this problem

 

[eddiem67]

what is the thickness of MDF your using, if its 3/4" step up to 1" also place a brace in the middle.

 

[Toysrme]

Like eddiem67 said, bracing and good screw/glue will go a long way for making 3/4 MDF stand up to 15s.