Shallow box for Sundown SD4 12's in Yukon

[aquill1]

On vacation and I don't have my computer.  Need help with box plans for simple sealed box for behind 3rd row of seats.

 

Vehicle:

2013 Gmc Yukon (non-XL/short rear)

 

Subs:

2-SD4 12" (D4)

 

Amp:

Rockford Fosgate Prime R1200-1d (birthed 1489rms.)

 

Dimensions to work with:

Height of 17" or less

Length of less than 48"

Top depth up to about 8" 

Bottom depth of about 13"

Recommended 0.8-1cuft

Opinions on sub placement (forward, downfire or rear)

 

I haven't seen anyone with the SD4's in all of my internet searches.  Haven't seen a yukon basic setup (similar to truck wedge) that is sealed. 

 

Any help is greatly appreciated.