Here is what I'm getting when recording with any mic straight into the Red (Sennheiser 100 series G2 in this case, same results with a shotgun). I'm using the Red mini-XLR adapter going in to Channel 2 (none of the others are better and this one sounded quieter. Phantom is not enabled on any channels, the input is set to Microphone (line produces essentially the same results) and the gain is turned all the way up. The audio is faint in the headphones while monitoring on camera and is very low and noisy in the file.
If I feed line level input from a separate pre-amp it sounds rosy. But this is not feasible for our 2 person field crew.
Any troubleshooting ideas? I've heard some have to have their audio boards replaced but I don't know what to look for in terms of symptoms for this to be the case.