my theory may be BS but the fact that better headphone actually give the listen better soundstage and imaging is true. headphone and iem have more science than just the transducer or driver. sealing is important and nowadays there are more drivers, different drivers positioning and etc. calling it BS is like telling everyone who reviewed headphone and iem BS. one of the highest fidelity speakers are like the electrostatics or hybrid like martin logan? or maybe some dolby atmos setup? i am no speaker experts so can you give me some example of some real hifi speakers? i think for every hifi speakers there should be an equivalent in a form of headphone. honestly do you guys even listen to both speakers and headphone/iem or you guys are just speaking theoritically? whatever i say is based on my own experience and not repeating what BS other people said. try using a cheap earbud and compare against a 200 dollars good sealing iem or a cheap 100 dollars headphone can tell me you hear no difference in imaging of the recording of any album.