Ice Box Enclosure

Help Needed – Trying to create ice installation itself?
I have a sub box with two 12 "Fusion Subs installed. What I am trying to do is make my own install but nothing too cheesy. I have a convertible so the trunk space is limited (I can adjust the box and thats about it though.) I've been playing with the idea of somehow trying to fit the speakers in the rear of the car without the box but, obviously, in the low sacrifising they produce. I also had an idea MDF put on the spare wheel and installing the sub in it and the wheel well as its own type of enclosure. Another idea I had today was that in the back of the car, only I have two seats and a bit in the middle than you'd think that is another post (but Golf is not like a taxi driver). Does anyone have any good idea that I can borrow or develop further. I just received my Dynamat noise absorbent so no problem. Remember, nothing too corny as these corridors child receives. Also do not want to put endangered the back seat too. PS, no area of the parcel shelf in the car.
so u can get rid of the submarine and get some that are Mounting swallow …… For example, kicker cvt
Industrial Computer Enclosures Protection by ITSENCLOSURES