So I don't have a lot experience with countryman mics. My artist has a H6. It's gotten dull in sound, but more importantly when he starts to speak moderately loud it seems to distort. No much but just enough to hear. I've changed packs (Shure UHF-R) and the sensivity is at -10 which is the lowest it'll go. -2 on the gain. He's not clipping the meter, but I cannot figure out what this is. Any ideas? Thanks.