Anyhow, the surprising thing is, the line out jack doubles as a 2nd headphone jack.
ehhhmmm... NOT.
Line-out is what it says, line-out. The iriver H1x0/H3x0 use the UDA1380TT chip for audio output.
It has two outputs:
- headphone-out, connected internally to a headphone-amp, short-circuit protected and all.
- line-out, connected internally just before the headphone-amp
In practice this means that using the line-out to drive headphones *may* kill the audio chip, which will also make sure the headphone-out is silent. Reports have been posted on MR about dead audio chips due to attaching two headphones to the iriver.
So while it works for you, know that you've been warned...