[dubrockmike]

I'm having the same issue. I'm using M-Audio Bx8a's (don't hang me). I replaced my cables with mogami xlr to trs. So that can't be the issue. My old mbox pro 2 doesn't have the same issue. I noticed the output is a little hotter on this mbox pro like you said. The strange thing is I've installed and uninstalled the drivers, restarted my computer, and gotten inconsistent results. Sometimes turning up the master volume on the mbox pro increases the hiss and sometimes it doesn't. I was also getting the same issue with my inputs. It showed up in my audio when I recorded on a mic but not on my headphone outs. It is very vinyl-esque too. It's not a clean white noise. It's subtly crackly. I'm going into Guitar Center tomorrow to show them the issue and hopefully get it exchanged (Because lord knows they're notorious for not being able to fix or identify actual causes of issues). I will let you know if the new one does the same thing. If it does not, then it could possibly just be our units. Although I have seen a couple other threads with the same topic.