Whatjd, I have a CD55 on home trial purchase. When I picked up the player, I asked the Resolution guy to compare the balanced vs. unbalanced outputs. He said the player is fully balanced, but unlike many players the CD55 "sums" the balanced signal at the unbalanced outputs to preserve the quality of the signal, i.e., no degradation compared to the balanced outputs. (I probably garbled this explanation). Anyway, the Resolution website describes this feature in more detail. I hope the design works, because my amp only has unbalanced inputs.