Does anyone know the size of the speakers on a 2006 gt? I guess I need to change them. The driver door doesn't work at all & the radio reception is horrible (I know that's not the speakers. Anyone have this issue? Was it the amp or a blown speaker? The stereo in mine is not impressive; would have expected more, but it's not Bentley type of quality. Not was my previous GT so I know the sound quality isn't just with my current car. Any feedback would be appreciated.