Speaking of hard wiring, I hard wired/soldered the power cord of my high current balanced power transformer to the romex cable at the wall and it was a revelation and showed just how much that ALL outlets degrade the PRaT and sound quality.
I left it that way for a few weeks but the thought of not being able to quickly disconnect the unit from the wall in case of an emergency forced me to reinstall an outlet and AC plug and that led me to try different outlets and AC plugs and it was the Oyaide SWO-XXX/WPC-Z/Oyaide P-079 that came the closest to no outlet at that time and when the R1 was introduced, the R1/WPC-Z took that even closer. Of course, these results were in my system and one should NOT expect the exact same results in their system.
Oyaide outlets and plugs really do need to be used together as they form a very synergistic match when mated and of course one can "season to taste" the sound quality one is looking for by mixing and matching the outlets/plugs.
My interest is still piqued on the Porter Port though...
Cheers