Just rolled off the tip of my keyboard. (After much deliberation).

Our Sound men,
Who are crammed in booths
Hollow be their headphones
The musicians come,
The complaining be done,
On stage, about monitors no less.
Spare us tonight from power failures,
And equalise those who feedback against us
As we compress against them
Lead us not to blown tweeters,
And deliver our amps from overheating
For this is the life:
The tinnitus and roadies
For hours and hours,
Amen.

Anyone got anything better? Any thoughts?