that thing connected to the spare tire bracket
 

just purchased a 2002.

i was told there was a cd changer installed, but i've figure out that the thing in the dash is just a cd "holder." interesting...

owner also said the changer was in the front trunk, but no. but what is that metal slotted box that's connected to the spare tire bracket?

Stereo amplifier.

My 2001 Boxster base has a remote cd holder in the front trunk where cd's can be loaded. However I don't play cd's as of yet and I have just unloaded the previous owner's cd's. This is located on the front left of the car as I look towards the back.