Hey, The speakers on the fox are a bit of a nightmare. To get to the speaker there are I think 5-6 screws located around the door panel, Some are on the underside and the rest are located in a few more visible places. The speakers are for some stupid reason riveted into the door meaning that you cannot just remove some screws and have a look. There should be a wax paper like cover under the door panel to help keep thinks waterproof, you might have to create a gap in this so that you can see through a hole in the bottom centre of the door where the window motor is placed, This will be the best place to be able to see if you can get in behind the speaker and have a look.