Okay, based on our development of the Ranger Tremor, the sub required a specific volume of the cavity with a tinny lattitude of plus or minus. What does your sub require vs the volume you created? I hope your volume is within spec.... Otherwise, as we found out on Tremor, we failed quite a few Subs. To little or too much seemed to be the deathnell of the speakers.
Ranger Vehicle Engineering
Ford Motor Co. Retired
I used your idea with the modeling clay and slaming the seat shut, but instead used they chemically reacting packing foam to measure the cavity of the storage bin, the stuff is called Instapak.
The space is slightly larger than the storage bin itself but around 0.3-0.4 cuft. I need to go submerge this thing in a 5gal bucket to determine the exact volume. This sub says it's good for 0.15 to 0.5 cuft.
I was going to do this for the space behind the rear seat but haven't yet, since I abandoned the idea of trying to build a subwoofer box to fit the complicated shapes it would need.