Hey, I just switched over from an AR16 to an AR16c and I noticed that (only on the stereo channels), the gain knob does nothing. The only thing that affects the gain is the +10db switch. I'm wondering if there's a button I'm missing or if I've got a faulty unit and it needs to be replaced? It doesn't matter I'm using the XLR or the line inputs, the gain knob doesn't change anything.