The 2007 Mustang rear deck speakers are flush with the deck. This is different than the 05/06 because the speakers have grills and are easier to swap.
To swap the speakers in the 07 you will need to do the following:
- Put the rear seats down.
- Pull up both door sills (they just pop out)
- Pull up the molding that is below the quarter windows (requires some effort)
- Use a panel puller to remove the plastic fasteners that hold the rear deck carpet down.
Be careful not to scratch the upper area around the quarter windows when removing the lower panels. You might want to tape those areas.
The rear deck holds 6x8 stock speakers that are basically mids with no highs. I installed two Alpine 6x9s so I had to do some drilling. I also installed my amp upside down between the two speakers using rubber gromets on the feet for insulation. I called Alpine and they said upside down was ok.
Alpine PDX-4.100 installed upsidedown. Notice the gromets on the feet. The wires need some work, but normally nobody will see those.
This is the rear of the car during the install. I used cardboard templates to mark the holes I wanted to drill. I used an old cover to place above the holes when I drilled them so I would not hit the window.
