Hi all, I would appreciate any help/advice with this... I am running sound for a school musical for the first time this year. I have all the equipment set up as well as I can. I have the house speakers which are essentially center speakers. I have two monitors set up on the aud floor (on stands) at stage left and right...and also two monitors on the aud floor also on stands at the left and right rear of the aud facing back towards the stage. So basically like a 5.1 surround setup. Anyway...all speakers are on an amp, and then go back to my mixer. Right now, I have the volume on the amp at about 50% and I'm trying to set good levels on the mics. However, we're getting to the point where we're rehearsing with the orchestra which is forcing me to really push volumes and I'm running into a lot of feedback. My question is, am I better off increasing the volume on the amp and lowering levels on the mixer, or vice versa? There is a "sum out" on the board which, from what I understand, is like a pre-amp.....and that's set at about 75%. Bottom line is I gotta get these kids louder, but I need to do so without blowing up my speakers. Any help would be great, thanks!