Interesting. You don't belive in hi fidelity otg.. I suppose I imagine those moments where things can be quiet, my city is not as busy , and really, a bus quiet enough, and passive seals are rather good, that in those moments, a pair that possess Hugh fidelity qualities, will provide high satisfaction incidents of musical joy. And that the small effort was made to make it happen.. ha.. Sure right now I am on a bus with with IE600 and for the year the return on satisfaction that what I am listening to, the music has levels of detail more than BT.. And with excellent passive seals on headphones, I reckon that the experience will be the same as this. Detail, separation. Etc.