Their first surge protector did have an over/under voltage shut down and they may be open to the suggestion of a UPS, however I think that would be the limit of any education that they would consider.
I hear your pain Mike as arguing with stubbornness has never proved fruitful with someone who has their mind made up. Once or twice a month they bring in some pretty well known headliners (EDM) and when they do they bring in their own pa as the house system can "only" average about 125 dBc on the dancefloor. Here is how they set up their mains, and monitors:
The midrange and highs just completely fall apart after about 15-20 feet with all the combing going on which is a problem when the venue is 120 feet deep. Those 2 monitors bounce right off the low ceiling so now you have 6 tops spread out firing sound into the crowd. I explained how many rocks thrown into the pond make for ugly wave patterns. I've shown them this app with 2 sources and then 4
http://www.falstad.com/ripple/. Then while they were standing about 40 feet back I physically lifted the tops on the stands off, inverted them upside down and placed them on the tops on the milk crates so they could hear the difference. The difference was night and day, they even couldn't believe how much clarity came to the mids after that. Next show, set up same way as always. Why? they said because that is what they know and what looks more normal and if the crowd didn't like the mud farther back they could always move up front.
. You win some you lose some I guess.
