Hello gents. I know that some of you are looking at power conditioning...............and I don't want to suggest this is bad idea, because it may not be..............
The Carbon has a universal switch mode power supply. This means that it is expressly designed and expects to see a line/mains voltage anywhere from 85V to 250V at either 50Hz or 60hz. In a sense, it already has a power conditioner in it, or more accurately, it responds well even to significant changes in line voltage. One thing you don't want to do is to introduce any unnecessary noise into it from a line conditioner.
The other associated equipment (with linear supplies) may benefit from a conditioner, but the Carbon probably won't. The Carbon is a fairly accurate amp, especially for its size and weight. It will tell what your source and headphones sound like fairly well. If it were me, and it isn't, I would focus on my DAC and headphones and get good interconnects. I think that's where you will see the most gains for the buck.
MHO.