I don’t find the SED Winged C’s thin, I’ve not had any issues of uncomfortable highs in my system using the 009’s, I would expect this to be a source issue if anything?
The Psvane company practices are dubious, the local market gets flooded with b stock crap (which lands on ebay). The only reliable place it seems to source from is a third party company who demand a better spec for their exported tubes. I can only surmise Psvane have a very poor yield of decent quality tubes.
I found it odd that the dam things sounded so good with such poor built quality, my quads rattled mechanically with extraordinary loudness.
Phillips replica indeed, Stanley Mullard would be rolling over in his grave.