I recently bought a pair of speakers to replace in my girlfriends car because one of her speakers was blown. Not knowing any better I didn't think of mounting depth, and it turns out that the magnet on these speakers is a bit too deep for the mounting bracket. I'm able to mount them, and was actually able to get one to sit nice. The other, though, vibrates like crazy on the low frequencies - makes the whole door rattle. Doing a little web perusing, I discovered that for her car the mounting depth is 2-7/8", yet the specs on these speakers are 3". I tried using some washers to try and meet the clearance, but it still doesn't seem to help the vibration noise. Any suggestions on what I can do to eliminate the vibrations (aside from exchanging the speakers)?!?!