A track can not really challenge a system. But there are some good benchmarks around for various properties
Dire Straits - you and your friend : Good one to instantly know if your speakers are well connected to your amp. Left channel starts, right channel answers.
Grace Maya - Kiss of Life (Live at Dug): Upright bass from A to Z. In my opinion the Upright bass is a good overall loudspeaker testing instrument. The Upright bass can dig pretty deep into the frequencies, but it also has ‘twangs’, ‘finger slides’ and ‘clicks’ in the upper bass and midrange, perhaps slightly in the treble. The track also has piano, drums and female vocals. Kind of a benchmark for credibility. Loudspeakers with a larger cabinet, decent drivers and crossovers will get this right in a sense of providing slightly more realism besides reproduction.
Francioso - Suspire
Bit more piano centered from the beginning, which is good to test the soundstage for a piano recording. Later on upright bass and drums follow. Good loudpeakers give the illusion of a grand piano in the room.
Yosi Horikawa - bubbles
I once came across this track watching a loudspeaker review. It was named for testing the soundstage. The problem I have with fully engineered music like this, is that the references to the real world are not there. It is impossible to relate to how sounds of instruments you can witness someone play really sound. Yes the soundstage is broad, but I couldn’t really find elements in that, that highlight differences between loudspeakers. But… it might be part the immersion. It is a fun track to play, pets like cats and dogs might also find it quite interesting to hear ping pong balls etc bouncing up and down in panorama.
Massive Attack - Angel: Electronic. A track that will stand out on loudspeakers with slightly bloated / exaggerated bass meant to provide hip hop and rock tracks with more body by default. It was the review test track for the B&W dm602/s3 which contained a relatively big woofer and was quite rarely, front ported. Giving it a bit of a slight slam. It doesn’t sound as ‘dope’ on more neutral speakers. I wonder if there are more examples of tracks that kind of just fall into place with some almost dedicated loudspeakers.
R.E.M. - half a world away
One on the lighter side for treble and midrange testing. Quite sparkly with guitar and mandolin in treble with the organ and Stipe’s vocals covering the midrange. Later on a violin joins the games as it comes to a close.