Thinking about the thousands of posts to this forum which debate what technologies out there today actually improve our recorded music listening experience, I thought, why not just compare yesterday's technology to today's, i.e. my circa 1959 Magnavox Transistor Radio to my iPhone 7 Plus. Listening to each, I can, for sure, say the iPhone delivers better sound in all manner that better can be discerned. It's just amazing, Now, I suppose, if we looked at the technology of these two devices, we would be able to understand why the iPhone sounds dramatically better and transfer that knowledge to our overall understanding of what is in fact important to reproducing more life-like music. At any rate, seems to me, what most effects our impressions of a great stereo or multi-channel AVS today are its speakers, with bigger sounding better. What technologies do you think help deliver a sense of realism?