I got tired of the hinged shelf and installed the 4 channel amp and Mputer on a false panel on the RH side of the trunk. The fold down shelf was an OK setup in my Intrepid, but it never seemed to suit the 300M.
I still have to tidy up the wiring and I'm thinking of making a couple black plastic covers for the power/speaker leads and RCA's just to "slick it up" a little more.
Then I'll make the panel on the LH side of the trunk which will house the shallow mount clarion Sub and the amp.
Here's a little of the build process:
Building the buck for the panel-
Ahh, there we go-
Putting it all together-
Latch for hinged panel visable (brass at the front). You can't see it under normal conditions but I'll probably spray it black also-