Yes, I understand that Pass is not intentionally trying to add distortion… but class a by design often has 2nd or 3rd as dominant…if you’ve been following an of Ralph’s posts on Agon, even when distortion is really low, the most dominant influences the overall sound and anything above 3rd results in harshness.
The Pass distortion components explain why it isn’t exactly tube like… which is usually higher in 2nd and higher in distortion overall.
As for PS Audio… seems to have many positive forum comments. Note that stereophile said mostly 3rd at 8 ohms and 2nd at 4 ohms. Might be an interesting pairing with the Sapphires.