2010 1.8 Vibe - Stock Sound System - Left Speaker Problem

[SSV3NOM316]

So after resolving my other audio problem (located on this thread --> http://forums.genvibe.com/zerothread?id=45872)I realized that all of a sudden my left speaker is lower in volume then my right speaker. Very noticeable when I readjust the balance from left to right.I haven't had any service repairs done. Still have stock sound system and head unit, didn't upgrade anything. Quite vanilla, however to my ears the stock system actually sounds great (considering its a stock system). I would like to upgrade in the future when finances allow, but for now I'm concerned with my left speaker. I did notice that my right speaker is buzzing a bit with low frequencies, however don't know and don't think thats related but who knows.Anyone have any ideas? Could a "bumpy" drive have caused some connections to come loose or something?I'm from NY, and do drive on the Belt Pkwy. For those not familiar with the road -- its one of the worst roads in NY, full of CRATERS. haha.