LSUmax

i know this thread has been run into the ground and most of you have moved by purchasing other units and throwing the Bose units into the east hudson, potomac, bayou etc...
It seems like everytime i hit a bump my left channel goes out! hit another big bump and it comes back on. Very temperamental. This is my third unit since i got the car 2.5 years ago.
Is it possible that it is just a lose wire into that channel only? I know this problem was quite rampant but did anyone get it resolved by looking at the actual wire connections?