What makes a system compelling?

In my case my system becomes most compelling when I listening to a recording I would usually have little interest in. I know that sounds stupid, but it is true. It is then I am most conscious of listening to the effect my system has had on a recording. Often I find I will like the sound of these recordings even as I find little of merit in the actual content. It arrives for me as a sort evaluative opportunity. Even then, I would not go as far as saying that I will necessarily percieve this as an improvement in sound quality. There has been a change, and I hear it and think about it. There have been occations- so many occations, when I have heard a recording that I have consistantly enjoyed but could not make out the vocals or instruments because it all became confused in the mix. I could not capture it. When my system has suceeded in untangling this for me I am impressed and I am thankful.This music becomes all the more to me, and I get this much more of my music collection back. I get to have this from time to time- clarity, and I value it and the means by which I got it.