At rehearsal today, I used the "house amp" = Mesa Boogie 400+ through an Ampeg 410hlf. Its a great amp, and I can hear all kinds of potential, but I just couldn't get it dialed in quite right. I like to be able to cut through the mix a little without being overly loud, but I had a tough time keeping this rig from sounding boomy. Some notes and strings were louder than others, etc. Help! 1) Where is flat? The knobs go from 1 to 10, I think, so I have no idea where flat is on the bass, middle and treble. I like to start flat and adjust from there. 2) What do all the pull switches on the knobs do? Are they useful? 3) What about the graphic eq? Should I use it. I went about half the rehearsal without it (to reduce the number of tone-changing controls on an amp I didn't understand), and then tried to use the eq to tame the boomy low end. Any suggestions? I think it is probably a great rig, I just don't understand it, and there's a ton of knobs, faders and pull switches.