Vintage compresion drivers.
and... the fabled Celestion Axi2050 which goes down to 200hz!
It hopefully will be availible one day but for now this is about as close as any of us are going to get...
Thank you to the Norwegian group for sharing this formidable setup!
It should be mentioned that the Celestion Axi2050 was on loan from Celestion for this event and was not available commercially at the time this was published.