Since the PS Audio PPP is replaced by the P5/P10, there are some good deals going on with the outgoing version.
I auditioned one last night but found the soundstage to implode a bit. On the plus side, I felt the overall sound to be a bit less harsh but in my case, the negative outweighed the positive.
My retailer then demonstrated a Transparent PowerBank 6. I thought it was just a surge protector but I was wrong. I noticed an immediate improvement in soundstage and felt the seperation between instruments were more defined.
At ½ the price of the PPP (PPP was $1200 on blowout) I took the PowerBank 6 home to discover it made the same gains in my own system.
Perhaps the electricity is cleaner where I live, Im not sure. Nonetheless, I give
to the P6 from Transparent.