Hi everybody, for some time now, one of my speakers (in particular, the front-right speaker by shotgun), is continually exceeding its maximum excursion, i.e. it makes a farting noise when a particular song's bass is too booming .. Note that it is only that specific speaker and no other, so though a song might be sounding just fine through the 3 other speakers, the shotgun speaker exceed xmax. What do I do to fix this? I've already peeled off the inner door panel to see if anything was rubbing up against the speaker and causing it to vibrate, but nothing was found. All help would be appreciated!!!