I just purchased an Icon Stereo 20PP tube integrated with headphone output.  It was a demo model, so I am unaware of how many hours are on the tubes.  I also know very little about the stock tubes, other than they are chinese in origin.     I have a set of Grado RS1i headphones as my go to...

I've posted this in another thread too, but nobody was answering...   Ok, I know that apparently nobody have heard/heard about this amp (Icon Audio HP8), but I maybe will take a chance and buy one of those, I can send it back if I don't like it...   I'm wondering if the tubes on the Icon...