I got a strut in there so its hard to have a proper look but from what I can see from outside, the covers are lifting from the parcel shelf and I can see that there is a gap between the speaker and the mount. (Bring to audio shop?)
Definitely not distortion cause the music is crisp clear, just the heavy crackling...
However when its on, it comes from the rear speakers, when the volume is really up there it goes mad through the roof?
Cheers..