I've noticed this rattling sound in/behind my door panel and was pretty sure it was typical sound deadening job I needed to patch up. To my huge dissapointment it was actually my SR6500 woofer
With lower frequencies as it moves it makes rattling/cracking sound that is very similar to typical plastic panel vibration noise. I took it off, push in/out on it with my fingers and same noise is there. I do have a spare set of SR6500s so I replaced this woofer right away but still very sad about one of them going out like that.
any way to fix it?
I can post a video if it helps.
Gains are set right, crossed at 60Hz.... the only thing I can think of as far as why it's blown (is it?? never had a blown speaker before) is that my headunit starts to distort at 20+ volume bar and maybe my brother who sometimes drives my car blasted volume a lot higher...