Based on years of trials and feedback, we learned that if you are plugging multiple(3 or more) components into a Hydra, the power cord going to the wall is the most important, and by a wide margin.
The fewer components you have on a single line (Hydra), the more things even out in terms of the importance of power cords to sources/amps versus the power cord to the wall. There are _no_ cases in my experience, where you should apply better power cords to components than you do from the wall to the Hydra. The power cord from the wall to the Hydra should -always- be at least the same quality as power cords attaching individual electronics to the Hydra. In my experience, this is true of other power distribution products as well.
Regards,
Grant
Shunyata Research