Rear Speaker/Sub Box

[zero610]

I had a thought about the area in the front of the cargo area where people normally mount their amp. Is this area large enough for a speaker or small sub box? Maybe a set of 6.5 component speakers for rear fill or an 8 inch sub? Seems like the area isn't very wide or deep, but it is pretty long - for enclosure volume.

How difficult would it be to make a box for that area that can be concealed under the carpet. Any thoughts?

PS - I already have my amp under the passenger seat so don't need to worry about where to mount that.