Here's a tip for you....
On the weekend I was asked to run the PA on stage for this social group I regularly do work for. My job was to provide the PA and cue/run the music for various acts throughout the day - no DJ'ing as such. I had 2 APX 152s as FOH with SUBS and 2 other APXs as stage monitors. I had 3 mics, one wireless, the other two on stands on leads. I was setup at the back-side of the stage.
All was good for most of the day, everything was working well and sounding really good. When outdoors the APXs can really perform.
Towards the end there was this fashion parade and the designer was to get on the mic and describe the outfits as the models walked out right.
Needless to say this designer had no idea how to hold a mic to save her life, you know the type, they hold it at stomach level so when they speak you can't hear a word they are saying. On top of that whenever she stopped talking she'd hold the mic pointing down towards the !@#$%!@#stage monitors and guess what? Feedback Euphoria!!!! I had to constantly drop and increase the gain whenever she spoke but because of the extra gain I had on her mic the damn thing would feedback if I wasn't watching carefully.
My view got progesssively blocked/distracted by all these scantily clad models who were all piling on the stage after their walks, did I mention I was setup at the back-side of the stage. I could now not see this designer woman and her mic. All of a sudden SREEEEEEEEEECH.....POP......the sound coming out of my speakers was like someone had stuffed cotton balls in my ears - no top end at all!
After a bit of investigation and stuffing around I concluded that out of the 4 APXs I had blown 3 of the compression horns....I was devestated. Luckily for me it was the end of the day and it didn't ruin the show too much. I now have to go to the trouble and expense of getting them fixed.
Yes I know I should of used some sort of feedback limiting device or been more vigilant in my mic handling but because of the small size of the show and the fact that the whole day went without one feedback issue until the end I decided to take that risk and go without. Its a leason learned hard. Thanks for listening.