said by scots:Is this sound quality issue only on XM? I have Sirius, and it sounds perfectly fine to me. I've had Sirius since shortly after it first went live. At one point a few years ago I noticed the quality dropped on some of the talk stations, but have never noticed a quality drop on any of the music stations.
You know, I have no idea. They do use different compression methods. I used to have Sirius and never had issues, and never had issues when I first got XM, it's only been recently that I started noticing the tinny sound of compressed music. Although some people may not notice it at all, still, it's not nearly close to CD quality.