Hi, Everytime that I fire up itunes to play music, I find that the balance of the sound shifts over to the right. Sometimes the shift is a considerous one. For the longest time I thought that my speakers were deficient, until one day I looked at the balance. I thought that once I had corrected the balance problem it would stop shifting, yet sure enough about 70% of the time that I boot my mac, the sound is shifted to the right. Any comments would be greatly appreciated. Thank You.