I ran a quad of the Psvane EL34PH’s (from ebay) for a while, all four rattled mechanically, I sent them back, the sound was amazing though.
I’d have to agree with the hype presented over on head fi, maybe Grand Fidelity would be a better quality supplier... I don’t know.
Running a quad of SED’s at the moment, they are nice, not Psvane EL34PH territory though.