I recently added polyfill and sound damping material to the Bose subwoofer enclosure in the spare wheel well of my '17 CX9. It worked great and I have tamed the unruly bass response. But I now have a problem with my front right-hand door speaker, which buzzes a bit on songs with HEAVY bass. On low to moderate bass, the speaker works fine. I am thinking I might have to add some sound damping to that speaker/door or just make sure the screws are well secured. Anyone have any luck with removing the grill to examine the front right-hand door speaker? I have not tried yet and perhaps it is a simple process.