I always throw this one out when I see posts similar to this...in fact, I include it on my demo disc that I take around when auditioning speakers. The band is called The Books. The second song, "Read, Eat, Sleep", on this album has notes that start right at the :52 second mark...I don't know what "instrument" (it may be digital) created them, but they do the same thing you speak of...lots of movement from the drivers of some speakers, but no sound. But then, you play it with a sub and it's a nice chest massage.
http://search.insound.com/search/showrelease.jsp?p=INS14670
