i have an mbox 2 and i am trying to record vocals using a shure sm57 mic but in order to get good enough levels i have to crank the input as close as i can to max on the mbox and even then i have to be super careful cause if i go any higher i get poor quality audio. i am wondering why i have to have the levels so high. when i record anything not from a microphone i don't have to turn up the levels nearly as high. so is there something wrong with my mic or my xlr cord? or is it something i need to do within pro tools? any suggestions would be great thanks!