I am doing my recording through a PreSonus Audiobox (which is I guess their answer to the USB firebox). It's working fine for me so far except for one thing. There is a prominent static hissing sound present in everything I record. I've narrowed the sound down to the box (so I know it's not my cables or my cheap-o mics) by recording into my computer with preamp volume maxed but nothing plugged into it.
So my question is... What can I do about it? Has anyone else had any similar issues with the Audiobox or USB recording devices?