Even if the there was a difference when the AQ was plugged in (and there may have been, in line with my prior post), the descriptions that you have used have no basis in science. For instance, unless your head was moved or the speakers were moved, there is no way for there to be "more space between the instruments". Even if your head or the speakers were moved, it would take a VERY unusual recording (and deliberately so) to exhibit a difference in the layout of the mixed recording. The vast majority of recordings are panned mono, and the "space" between signals is fixed. (pls see The Franssen Effect #2, and derivatives thereof: https://en.wikipedia.org/wiki/Franssen_effect )
Another problem is the phrase, " ... a blacker background...". I would assume (yes, I know that I shouldn't do that) that you mean the noise level of the recording when there is no signal. Normally speaking, this would only be noticeable if there was a radical difference in noise level overall .... because noise in a circuit doesn't go up and down according to portions of the recording. Electronic circuits don't know which part of a song or recording they're being tasked to reproduce. They can't think. So you would notice a noisier environment when music was playing, too.
OTOH, if you're talking about a "blacker background" only when the music is playing, that doesn't exist.
When you say, " ... more 'pop' to the music ...", that term is so vague and meaningless that people can only guess what you mean. Subjective terms are not universal. They are not reliably able to transfer meanings from one person to another. I have no idea what you mean by that.
As for "sparkle", the thing that comes to mind is frequency response. However .... a digital signal doesn't change frequency response by itself; it is an unerring slave. And if the speakers or output levels were not changed, those cannot change frequency response, either. So what remains in your system to change frequency response and cause "sparkle"?
That would be interesting to investigate.
I wish you good luck. I would also like to make a comment: you seem very upset that people here don't believe you. You seem to think that their disbelief means that they are your enemies.
Nothing could be further from the truth. No one is your enemy here. As I said before, they are simply disagreeing with you, and they are doing so on the basis of sound principles. They might be the best friends you can have in the audio world. They would like that. I would like that. Give it a chance, and you might like it, too.
Jim
Well, I got the test results right, so either a) i have superhuman hearing or b) my mind made up the entire thing and still got lucky with the results.
Either way, I'm happy with the outcome. [and no I'm mad anyone doubts me. Like I said, I'm the only one who has to care]
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