Hey, I have a m-audio fast track pro, and I wanted to ask if it's normal for these pre's be so friggin' bad. It receives direct guitar signals well, but for mics, sm58 or even sm81 (with phpower obviously) it need to have the knob turned on at max to get a "normal" signal, even then it's pretty low... Are these just teh suck? Or is there something wrong with it?