louisw,
I mounted my a/d/s/ P840.2 underneath the rear package shelf. This is a fairly large chassis amplifier, width X length, but it has a short height (chassis & heat sinks).
The package shelf was an ideal location for me as I did not want to impede on any luggage space.
The amp is mounted to a carpeted piece of MDF board which is then suspended approximately two inches from the package shelf by metal brackets.
When you open the deck lid you can't even see the amp unless you kneel down & look up as the trunk opening is actually lower than the amp.
My Infinity Kappa Perfect 10 subwoofer is mounted in a Q Logic box which sits on the trunk floor directly underneath the amp on the passenger side (offsets the driver's weight). I had the cables to the sub extended & quick disconnects installed in case I had to haul something oversized & needed to remove the sub & box.
Hope these ideas help.
1999 SVT Contour, #2140 of 2760, Tropic Green - Medium Prairie Tan
Koni Sport struts; TSW Blade wheels; Nakamichi, a/d/s/, Boston Acoustics, Infinity I.C.E.
1989 Saleen Mustang, #89-0408, too many mods to list here
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