Did you ever HEAR the Grateful Dead's Wall of Sound system?
They had it when I heard them at RFK stadium with the Allman Brothers in 1972
disarray isn't the word I'd use - - the sound was amazing!
And yes, it was logistically insane to transport, no doubt!
But they didn't do the low low bass some music contains these days ...
But sorry, this is a way from the "sub for DD66000" discussion ...