Hi Love my XM. My ? is on some channels it sounds Great(raw) it is clear like a cd. but on other channels(fred,ethel) it seems to have a staic backround noise. I did a speaker upgrade from stock at same time. I was woundering what level I should run the skyfi unit at ? The level control is located in the skyfi unit receaver it self.I have done some playing with it but it still is there.My anntena is inside on the back package tray by the 3rd break light. Any info or suggestions welcome. Ya my spelling sucks.