A couple of years ago I had a big amp like this one but one with 4 headphone inputs and sold it on headfi.
I can't remember very well how much difference there is between balanced operation and unbalanced (I only remember there was a difference in sound level - when I listened to a balanced and unbalanced HD650 both at the same sound level then the balanced HD650 phones sounded a bit louder).
I can't remember very well how much difference there is between balanced operation and unbalanced (I only remember there was a difference in sound level - when I listened to a balanced and unbalanced HD650 both at the same sound level then the balanced HD650 phones sounded a bit louder).
