subwoofer box
 

I'm looking for a subwoofer box for my Z, i see the dual box rear firing for two 10"s and two 12"s ... I was trying to fit two image dynamics idmax 12"s. I was thinking if there's any way you can make it into a 1.10- 1.30 cubic ft per chamber ? Just maybe extending the front of the box outward or something ? Thanks !!