i am starting to try and figure out how to bi-amp (i think that is the right term). i just purchased a boss gt-6b and it has stereo outs on it and i am running it into a g-k backline 350 head into the backline 410 cab, and also into a kustom 250 head into a kustom 2x15 cab. im useing the g-k for more of a bright sound and the kustom for a bassy\midrange sound. this is my first attempt at anything like this and i dont know if i got it semi-right or not. i've heard of pre amps, d.i. boxes, and a few other things of the sort but i really don't know what there all for, or if they aply to bi amping at all. also, i haven't used this setup live yet and was hopeing for any advice on how to mike the cabs, or should i just use the d.i. out on my g-k head. thank you for any advise that you have.