In general, rock & metal will make li’l speakers fall apart, if cranked up loud enough in a large enough room..
Here’s a prog metal track that falls in that category ( a bit more complex though, not quite the run of the mill rock), in fact most of opeth’s 2 albums, black water park & deliverance would fall in that category.
Opeth - The drapery falls
https://www.youtube.com/watch?v=YeTNkPXRrVY
But, as you might suspect, the audiophile ain’t listening to rock & metal, because it isn’t recorded well enough for his delicate sensibilities.
So, let’s get into other slower genres that could be recorded really well (so he’ll try to listen to it), but, will still let him know when his rig is crap...
When you have a lot of dynamics, deep low end with more complex vocal arrangements on top of it, all those dinky li’l 2 way bookshelves fell apart.
Here’s one
Baaba Maal - Gilli Men
https://www.youtube.com/watch?v=J5IRSe2h8CY
Now, if we were to get into more weird stuff...
Most mastering engrs around here haven’t heard the Vitas vocal range, i bet...Here’s some where he’s screaming high simultaneously when the grand piano’s tumbling down into the lower octaves....
Vitas - Symphonic
https://www.youtube.com/watch?v=1Dz2pwD8gpc
etc etc
This is another bit of strange (ask a violin player).
Jonny Greenwood - Open Spaces (There will be blood OST)
https://www.youtube.com/watch?v=APYLVQxx9Jo
@deep_333:
How about some examples in the Rock genre?
When I was at THE Show last year, I had them play this track on the SVS speakers and they had no highs/life. Would love to see small speakers do justice to it at realistic volume.
https://youtu.be/dqM5L5JQseI