Bongo Fury

I've been thinking about laying my hands on one of these:

http://www.pioneer.eu/uk/products/25/13 ... /page.html

Question is, where might one install such a device where the missus wouldn't notice it? Under the driver's seat would be perfect (which is what I think it's designed for) but there doesn't seem to be much room under there at all.

I have a full side conversion... any bright ideas?

I'm not certain if it will fit, but if you remove the glove box there's some space up inside there and a fat metal rail to attach it to.

Thanks... I will investigate.