Hi guys, With this whole objective vs subjective debate raging on, I'd really like to educate myself to understand the objective side better. I understand the basics of frequency responses and transients, and how some components are theoretically indistinguishable to the human ear after a certain point. My question is more about what some may consider the more subjective descriptions of sound, namely soundstage (width, depth and height), imaging, and the perception of detail. I've heard the claim that all parts of sound can be objectively measured, so could someone please explain what causes these illusions of the mind? Graphs and pretty pictures would be great, but any help is appreciated. I'm also interested in how "spacious sounding" DAC's and amps affect the performance of the headphones plugged into them. Does the headphone itself need to be capable of throwing a large soundstage in order to take advantage of the benefits provided by the amp or dac? Or is the effect "cumulative", as in any improvement along the signal line will positively impact the soundstage experienced by the listener? Thanks in advance!