Lol I'd believe it... Don't you also think it has to do with the distortion as well though?
Seeing glowing tubes sounds like fun :)
I like the HD600 sound for the most part, but I get the feeling I'm missing a bit of detail in the treble region... (and lacking sub bass)
You could get a transparent SS amp and add the tube distortions via software, but where's the fun in that?
I remember you were interested in the Somics... according to Boris they have more subbass than his hd600 and according to me, the highs on these things are very lively indeed. Also one of the smoothest I've heard in their unmodded state. Right now I've taped the vents inside to get more subbass and padded the pads with tissue to prevent them the inside from touching my ears. Only complaint I have now is they now clamp too tight on my XL noggin, so I'm giving them stretching exercises every day