When multiple small drivers feels and sounds satisfying, but somehow inadequate...
https://www.wired.co.uk/article/despacio

I read about this system the other day in a great article about the Wall of Sound posted on a website that has since shut down. The people that designed this were not Deadheads but acknowledge that the lineage of the technology they used and the audio design concepts started with the Dead. Peter will be happy that it includes 2x 21" subwoofers. The wattage of the Macintosh power amps used eclipses what was used for the Wall of Sound.

If this system were to migrate to US clubs, the first thing I would do is pile a bunch of my investment funds into companies that manufacture hearing aids.