There is a difference between a Demo and a Reference track.
One of my reference tracks is a nostalgic favourite of mine but sounds lousy on most systems, even very expensive ones. 10CC's I'm not in love. Great performance but just seems to have a high noise floor with poor dynamics. When I hear it rendered in a way that makes it at least passable soundwise then I know the system is working.
Another reference is the album from Christina Pluhar, Los Imposibles. One of the best recordings I own. It's a beautiful recording capturing the size of the acoustic space and revealing great purity of tone.
I do not bother with the above for demo, my weird friends have different tastes. When I ask someone what they would like to hear they mostly say ' just play anything' so I put on Patricia Barber and play a couple of tracks, certainly not the whole album, she wears thin very quickly.
Reference and Demo, is it possible? YesChuck Mangione: Children of Sanchez (explosive dynamics, outstanding performance) Play loud
Mighty Sam McClain: Give it up to love, track 2, too proud ( won many awards such as blues album of the month) Play louder
Osamu Kitajima: I don't think this album has a name but the track of interest is called 'yesterday and karma' When I first heard it I thought I was hearing a synthesizer but it turned out to be Minnie Ripperton's incredible voice, WOW! When the tune was written Osamu could not find a Japanese girl who could hit these notes so Ms Ripperton was called upon. This is serious goosebumps territory and if you do not react/respond to this then perhaps your system is wanting. All his stuff is interesting