[MrMobius]

Can one feed a portable (Pan Am and / or Leckerton62mk2) into another amped device i.e. my Arcam rCube?  It's just that I would like to be able to use the DACs of the devices. The rCube has a line in.
 
Another mad (maybe) question is if there is a solution (other than contact lenses or someone who wears glasses for reading and computer work but also wants to listen to full headphones at the same time?  I would use IEMs except I have the world's gaga refelx and they make me...

 

[Armaegis]

Yes, you can feed an amp's output into another amp. Ideally, the first amp would have a lineout.
 
As for glasses while wearing full sized headphones, it really comes down to individual headphone, head size/shape, the kind of glasses you're wearing, etc. In general, you will want headphones with a light clamp and cups that aren't too big on you so they won't impede on the arms of the glasses.