That was very likely Bose. I sat through one of their demos and that's exactly what they did. But more than a demonstration of how sight can be misleading, it was more of a demonstration of how music you are unfamiliar with can be misleading. Especially if those doing the demo intentionally make it misleading. The music used for the demo wasn't really music, it was more like movie sound effects and movie soundtrack muzak. Nothing that you could be familiar with and be able to translate how it should sound on a real stereo. Sounds that could be EQed and carefully chosen to not demonstrate the hole or discontinuity the Bose system almost certainly has between the sub and the mains. An interesting demo of how audio tricks can deceive you.
Yea its Bose. But even before they moved the covers I noticed cracks in the sounds which I thought it was werid. Then they removed the covers and I'm like that is why the sound cracks. Too loud/much power into drivers too small can often do that from my limited experience with speakers.
But I was impressed when they covered it with a box and it still sounded the safe due to their dynamic changing whatever. Maybe I dunno speakers enough but that was quite interesting in my opinion.