good idea.. I thought of doing that.. you might want to try and mount it upside down on the rear deck. but im not sure if it will hold or not. Cause amps are kinda heavy. and if you are planning on using more than one.. it might be a problem.. I was going to go that route,.. but then I remembered that I often take that piece out to get more cargo space.. so I just put everything on the backs of the rear seats.