What would 'FLAT' EQ be considered on my Ampeg BA-115. It really doesn't say in the manual. I (obviously) have Treble, Mid, and Low knobs. They go from either 0-10 or 1-10 I can't recall..but is '5' flat? Some people said it wasn't to me before. I also have a 'Style' knob that goes from 1-5..and setting '3' is flat. So in order to make my amp 100% flat, would I set my 'Style' to 3 and treble/mid/low to all '5'?