Hi there, Was hoping for a bit of help. I'm a musician and I use my MacBook extensively for my work so this is quite an issue for me. I never had an issue with sound balance, until I tried out some old speakers (I knew one of them was dud) so I tried to alter the sound balance to compensate for it. Removed the speakers, went back to using my normal speakers and the sound balance was pretty off to the right. Tried my earphones, and the sound balance was WAAAY off to the right. Went and checked the balance in System Preferences, it was spot in the middle. The only way to get the sound remotely equal is to put it far left, but then obviously the volume isn't as loud. Opened up Audio MIDI setup, adjusted some things in there (made it much worse and can't default ) so I'm a bit stuck for a solution. Impossible to play anything out of headphone jack due to the terrible balance. Can barely hear anything out of the left. Help would be much appreciated. (P.S, My earphones & speaker works fine with my iPod).