does phantom power have to be engaged on mackie board? I have mackie board coming out of my krk monitor speakers and never had a problem with the speakers. I was afraid of frying something so i left phantom power off. It WILL play out of an amp but NOT when xlr out goes to xlr in of mackie board, do i have to change the internal output settings? its already internally configured to output of studio/direct on pod hd500x. frustrating,second problems with this unit