I've owned my Macbook Pro for about 2 months now and theres a problem with my speakers. They essentially sound muffled and quiet. Anyways, I brought it back to the Apple store and they reluctantly replaced my speakers and had it ready to go. I brought it home and the problem was more or less gone. Now it isn't persistently muffled just goes muffled for a bit (about 2 or 3 seconds) and goes back to normal every little while. I suspect it's a bad speaker connection of some sort. Anyone else experience this issue?