There is an annoying vibration coming from the passenger side A pillar where the HK tweeter is mounted. It's really bad during Bluetooth phone calls to the point I have to reduce volume. It's also bad during some music portions. Is there a way to fix the issue?

Also, is it possible to tighten up the door panels?

Thank you everybody in advance for your tips!

 

Pop off the a-pillar, and hold it up in the air, if you still have a rattle then the tweeter is blown.