How can you tell when you have blown a speaker? My front passenger speaker sounds like it might be blown. It has a vibrating sound coming from it when bass tones hit. I'm talking about the one in the door and yes it's stock. When I put a little pressure on the the speaker cover the vibrating noise coming from the speaker stops and it sounds find. Is the speaker cover loose maybe? Or is it just blown? Anyone have this problem ever? Any help is much appreciated as always. Thanks, Dom.