Yes, I saw a demo like that I think in Disneyland.
I was wrong about the series. Mine are the Series 2. I found the attached PDF that describes their design and even includes schematics. I have the 3-terminal version which was intended for some kind of a virtualized Bose never introduced. Have a look t that schematic. Both woofers operate across the entire frequency range.
https://www.google.ca/url?sa=t&source=web&rct=j&url=https://www.audiolabga.com/pdf/BOSE601II.pdf&ved=2ahUKEwiar4y32tngAhUI11kKHZngDGIQFjACegQIAxAB&usg=AOvVaw1I-4WdaytPQBRj92IsdMSj
