Too funny Rick. I was just watching some of the eD videos on YouTube literally 5 minutes ago (about the time that you posted)...
I am finding all sorts of "guidelines" online about building a box.
Add at least 2 inches to the depth of the actual speaker for movement.
Depth = 0.7 x Width
Height = 1.4 x Width
Add 20% to cubic feet to allow for speaker itself
When in doubt, target the middle of the recommended cubic feet range.
Make sure that the finished sub box will actually fit where it needs to go.
So in my case, if the sub says 0.7 - 1.3 cubic feet, the middle ground is an even 1.0 cubic feet. Add 20% and you get 1.2 cubic feet.
Follow the math above, and a box 10.5" deep, 14.5" wide, and 20" tall yields 1.213 cubic feet.
I don't know if that will fit in my trunk, however. I'll need to mock something up and test fit.
