So my band and I are performing Sweet Child O' Mine (and a few other 80's songs) for a school event Saturday night, in a gym. There will be 500-1000 people there, and the gym has a nice big stage like for plays and stuff. All I'm using is an Ampeg BA-115 (100 Watts). There are 6 of us in the band. Drummer is very very heavy handed (plays loud, but will not be miked at all) Lead guitarist plays through a Peavey half stack. Rhythm guitarist uses a 2x10 Vox solid-state amp. Singer has the whole house PA, so he's fine. I had the option of using a provided sound system which is probably somehting like two 15" speakers..and I hear that bass will bottom those things out. It's in a big open gym (like a whole basketball court sized one, the wooden floors, etc.)..there will be chairs filled with people from the stage to the back of the gym, and the bleachers filled, and that nice big stage to reverberate noise. Will my amp be able to fill that whole gym? How should I EQ the amp to do this the best I can?