Well i just received my iMac and everything looked perfect until i noticed the stereo sound isn't good. I can hear the right side more clear than the left side and after adjusting the speaker balance the left speaker looks to be broken, there is absolutely no bass coming from the left side and the sound that does come out of it is extremely soft..
I set the balance tot the left side and shut it down. Aftere about an hour or so i started her up to play around a little and when i played a music file i noticed there suddenly was some bass coming from the left... it looks ok for now...They were going to pick it up for repair, but the left speaker works now!