We are talking deep, deep bass. And at super high SPL levels.
I have not measured it but a lot of what was playing was subsonic.How deep? How high?
What's the lowest fundamental you (personally) hear as a tone?
Obviously, only organists with very long arms need apply ...
This one's rather special, Bob - https://en.wikipedia.org/wiki/Sydney_Town_Hall_Grand_Organ, one of only two in the world that have the longest pipe, 64 feet. I have seen that as a backdrop endless times, while the Opera House was being built this was where all orchestral concert performances were held, and some popular music concerts - I heard Vollenweider here, a very impressive show ...This one's in Sidney Frank, your capital: