Why do I need to do the research myself to prove whats already well understood technology deplyed throughout the recording and reproduction industry? If all these perceptual characteristics can't be measured, how is it that recording engineers have been reproducing and enhancing these phenomenon for decades? Prove it? Go to Best Buy! Buy a CD! Talk to an engineer! You people talk like all a recording engineer does is throw some mics in a room, pick up the sound, balance the levels, and send it out the door. Not even close! The guy who advised me on my room is a Billboard charting producer and engineer. I've seen, heard, and watched what he does. There's no snake oil, myths, or guesswork. The guy knows what you're going to hear because he knows what information he's incorporating into the mix to create the illusions. "Can't measure a soundstage..." Whatever!