I own a PPP purchased 2/07. My APL/Esoteric definitely sounds better straight into the wall - more lucid and dynamic each time I tested it. Perhaps it has something to do with the R-core transformer.
Through experimentation, I found that on a good power day, some other components sounded better connected direct to the wall. Problem is, you never know what days will be the good days so overall, the system sounds better with most components plugged into the the PPP.
I am not a big fan of nickel plating. I think I read that the buss bars are also nickel plated in the PPP. The PPP cannot be retrofitted with other outlets due to the construction method used so you are stuck with nickel. I think the PPP would be better without it but Paul McGowan apparently thinks nickel is great.
Through experimentation, I found that on a good power day, some other components sounded better connected direct to the wall. Problem is, you never know what days will be the good days so overall, the system sounds better with most components plugged into the the PPP.
I am not a big fan of nickel plating. I think I read that the buss bars are also nickel plated in the PPP. The PPP cannot be retrofitted with other outlets due to the construction method used so you are stuck with nickel. I think the PPP would be better without it but Paul McGowan apparently thinks nickel is great.