Drop In, Drop Out
Radio quality of either satellite radio service isn’t quite what either Sirius or XM Radio would have you believe in their marketing hype. It is not pure CD quality (although, technically, that may be what they’re streaming). (See this interesting thread on Sirius and XM sound quality.) I’m not the first to notice or comment about this quality issue.
The voiceovers, especially, I’ve noticed having a tinny sound to them, as though the announcer was in a little echo chamber.
If satellite radio wants to keep the customers its got and keep adding new ones, it has to do a better job at increasing its sound quality. While you won’t notice it in day-to-day listening (for the most part), you will notice it when you’re listening to the voiceovers.