Is it just me or does the xm channels seem weak on the quality? I have an h20 using the optical out to my amp (in stereo mode). Most of the channels lack anything under 200 hz. The hip hop channels are fine. If I take my roady 2 and connect it to my amp it sounds fine. I tried changing the h20 dolby digital output to off and still no difference. Tech support tells me they get a direct fiber line and it should be no loss in frequency bandwidth. It's like listening to a transistor radio