Lucky you. I bought my iDSD nano 5 month ago and still cannot properly use it with my IE80. Still stumped that for a 200 Euro product these essential accessories were not included - instead I got a common RCA cable that I already have and also do not need and have to pay for these extra...

Currently own a pair of IE80 and I am very happy with them; mostly listen to Rock/Pop music. You think it would be worth checking out the Delta or will they offer no improvements over the IE80?

  No. Not just 'if you think so'. I can definitely assure you that we were talking about the Plus and that it can definitely be connected to the audio jack. Whether that is a good idea is another story. I get it. After all, why would you buy a DAC and then not use it.

  We are talking about the Plus which also can be connected to the audio jack.

  I already own an iFi iDSD nano which is great both with my desktop PC and smartphone but I thought maybe this would be a good chance to get a second DAC at a good price that I can exclusively use with my smartphone so the iDSD can stay at home.   I know of the risks involved with...

  So in that case what does the DAC chip do with the analogue signal from the audio jack? Does it just get passed on unmodified or does it do some weird some stuff like converting it to digital, applying some filters and converting it back to analogue or some other magic? Again, not an expert here.

Found a cheap portable DAC/Amp as a project currently on Kickstarter: https://www.kickstarter.com/projects/806452349/onblink-amplifier-world-smallest-portable-amp-dac   What puzzled me was how they went on about how the built-in DACs in mobile devices suck and why one should use a better...