sherod:
The Synergistic Research Black duplex may well have started out as a Pass-Seymour outlet. Then SR takes that outlet and does several thing to make it sound better.
The SR Tesla Plex apparently starts out as a Levitron hospital grade outlet and then is modified to sound better.
Porter outlets takes a Hubell outlet and then cryo treats it to get a better sound.
PS Audio sells their outlets that look like the main bodies are the same as Furutech"s. It sounds different than a Furutech.
All of these outlets sound quite different than the outlets sold at Lowes.
I am very impressed with the sonic qualities that the Synergistic Research Black outlet imparts to a system. I think the sonic gains I have obtained with the Black outlet are worth the price.
I do think the changing the wall outlet produces a greater sonic change than most tube rolling does. Each type outlet will have it's own sonic signature. It is tedious and time consuming but for my audiophile education, it has been worth the effort to audition many outlets.
Excellent listening to all this week.
David Pritchard