Boxes in trunk

Asked by May 11, 2018 at 06:29 PM about the 1997 Mercury Grand Marquis

Question type: General

There are a total of 4 boxes in the trunk of my car.
1 small black on the left side, same small black on
the right side. The big silver one I'm assuming is an
amp? And the smaller one towards the middle says
Isolated Radio Antenna. The only thing I have in my
car is a cassette player and radio. What are these
boxes? I have more photos but not sure how to add
more than one.

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