1. My headphone system is completely independent of room acoustic anomalies that plague room systems - echos, standing waves, comb filter effects, early reflections, phase issues,. I do not have to constantly tune my room, I.e., playing around with room treatments and adding/moving/removing them, as well as moving speakers to keep up with all the changes and tweaks. It can be an endless cycle, I don’t have to tell you.
2. I have no AC issues, or AC ground issues, since my system is battery powered.
3. I avoid the noise and distortion that accompanies power cords, speaker cables, interconnects, and digital cable.
4. I avoid noise and distortion that accompanies transformers, large capacitors and fuses.
5. I avoid distortion produced by speaker crossovers as my Sony Ultralight headphones are crossover-less.
6. I have greatly reduced the number of variables that affect my sound by going to a small, battery powered system. This makes things much easier to CONTROL.
7. Immunity to RFI/EMI.
8. Immunity to vibration.
Quick Summary - More music, better sound, less audio nervousa.