paired gain problem
I am looking for some input on a weird problem. I have a paired channel with identical gains for each, but marked differences in levels. I've troubleshot the problem by plugging in a tone generator directly into each channel and found that the levels differ by almost 20db. I did an initialize on the board to make sure there was not some strange EQ or compression boost or an insert or anything like that...and the problem persists. I also updated my firmware from 3.07 to 3.09 in the hopes that maybe that would solve the issue.
The low-level channel also makes a terrible noise (with nothing plugged in) when I turn phantom power on and off on the channel. Sort of a crackle-hiss thing, very loud.
So, I am concerned I have developed a hardware issue. However, I wanted to open up this question to the group mind to see if I might have missed something obvious here.