Like most things audiophiles say: I call bullshit.
http://soundexpert.org/articles/-/blogs/audio-quality-of-lig...
> Audio quality of Apple Lightning to 3.5mm adapter (A1749) is almost as good as in-built mobile audio solutions by Apple, though it has slightly worse df-measurements. Mostly due to the higher jitter. But if you listen music you will not hear the difference; it is too subtle to be perceived.