I think that the primary issue would be warranty, but of course then, we would have opportunity to post threads on "fan causing noises in my EVZAX1's" and have as much fun as we are having here.
The primary problem is heat, a correctly designed electrical shutdown event designed to protect the speaker from catching on fire, which would not be good at said ceremonies. As Bill indicates, some ceremonies, it may not be possible to prevent direct exposure.
Since Bill doesn't want to sell them, my simple solution based on reading his postings this thread is to avoid the ZXA1, and use a mackie, which is heat sinked to prevent such occurrences. Use the EV inside where it is cool.
There should then be no further issue with heat shutdown.
Problem solved. I'm out.
PS: It IS arizona, right? I'm thinking Hot from the beginning of March till October.