@itzhak1969--I'm pretty firmly rooted in the subjective camp with a healthy respect for science. Could some of the sonic attributes you mention, like brightness and perhaps even sound stage, be measured by fourier analysis? I don't know the answer, but it would seem like frequency peaks and dips, and timing in relation to frequency, should tell us something. I'm posing this as a general query-- perhaps this stuff has been measured with no demonstrable difference, although it perceived by listeners. I'm not try to fan any flames, actually trying to bridge the gap. I suppose I could grab someone in the engineering department at UT, but unless an engineer is specialized (or at least interested) in acoustic analysis, I'm not sure they could help.