By the way, have you seen the OS X sound settings under System Preferences?
Left/right balance on headphones
I have partial hearing loss in one ear and need a boost there but can’t get the option on my Sony PHA-3 headphone amp when I use it with my Macbook Air. I have explored the web and found out that a left/right balance option is not easy to get with headphone amps. Love the sound through my Seinnheiser HD 800s but wish I could adjust it. Any advice? Thanks!