The short version of this post: using a T adapter (from justubes, 5/2) inserted into a Fuse Box, a PURON can be placed into one of its plugs. The resulting sound is spectacular, bringing you even "closer to the music." Only continue reading if you want more.
I had been using two PURONS in a Synergistic Research Powercell 12 conditioner, and one PURON in the wall, in the same duplex as the conditioner. This was a well-established baseline, over at least ten hours of dedicated listening. I then removed the PURON that was furthest away from the power cord (end) of the unit. I noticed a decrease in volume and a sense of restricted dynamics.
I plugged the T adapter into the Fuse Box, and inserted the power cord that was connected to the electronics (creating a straight line). The other end of the Fuse Box, and the shorter power cord running to the Powercell 12, remained unchanged.
The resulting sound was head and shoulders better than when the process started. It was as if all of the wonderful attributes that others have attributed to both Fuse Box and PURON were enhanced by their proximity.
The PURON into the T adapter faces into the room. The blank (opposite) side is next to a wall. Yes, the weight of the PURON must be supported. Yes, I am thinking about what a replacement (an additional) PURON might do for me...
So, onward and upward. Just when you are marvelling at what you are hearing, new ways of employing these devices keep pushing the envelope. Thank you, Mark!