I think I have your fix. When I dynomated, I did the drivers door (dumb thing to do) well, I had a squeek. Thought it was the speaker for a month or two. Well I think the squeek is where the door butts up to the dash. There is a small gap in between the two. But mine is so close that it rubs and squeeks. That may be your problem too. When you are driving, stick your left arm out and use your fingers to pry the dash away from the door and see if that temporarily fixes the squeek.