Didn't mean to hijack this thread and probably should have started a new one on this topic but here is one more and I'm done. Well at least it has a midrange driver in the video
String Modes. Good visualization of the resonant modes. The important part is the amplitude changes or why we hear the lumpy clumpy bass or other anomalies in sound when speakers are interacting with the room. It works in a similar way.
https://youtu.be/cnH2ltfW48U