Several years ago while our son was getting his Masters degree in percussion at the University of North Texas, they had a summer jazz festival that we went to. All entertainment was free. Saw Tower of Power, band and sound was fantastic.
Just before the Pandemic went to see REO, Don Felder and Styx. All used the same system, but had their own sound engineers. REO's sound was horrible. A total disappointment. Felder and Styx were great.