In Amir's review of the Schiit Magni Heresy, he mentions that channel imbalance is known and you might have to go through a few units before you find one that is balanced. Is this something that is noticeable at normal listening volumes? I can't really be sending another amp or multiple amps back, as I already lost $75 doing this with the JDS Labs Atom stack.
Why did you send it back? Did the JDS Atom also have a channel imbalance problem?