So the notion of soundstage being a property of headphones certainly has a lot of substance behind it, and indeed, even untrained ears can anecdotally easily perceive this. However, the theory behind is rather confusing to me. Since soundstage seems to be related to the openness of headphones...

Hey everyone, I'm looking to get an affordable ($500-1500) and decently portable binaural recording setup. I'd like to record a variety of sounds through headphones and two-channel systems, and also want to experiment with live music, random sounds, and ASMR. I wish I could get the Neumann KU...