Mini Subwoofer location ideas

[Rennen]

I just got a Kenwood "WooX" powered subwoofer for my fastback

http://www.crutchfield.com/S-vkMORl9...sp?i=113WA62RC

It's quite small(about 15"x8"x4.5"), and I'm wondering if anyone has a similar subwoofer or some creative ideas on where to place it.

Limitations:
-Cannot cut into cargo room at all. This car is my daily driver and I need all the cargo space I can get
-I don't really have back seat passengers ever, so that area is good, but I cannot remove body panels/seats because I am in a stock class at autoX
-Not a place that is prone to rattles


Oh, does anyone know if the place in the backseat where passengers could put their elbow is separate from the rest of the panel, because that would be perfect.(If anyone knows what I'm talking about me= )

-Matt

EDIT: I see now that my post is completely worthless without some pictures, I will take some in the morning and this might make sense