[Geluso]

Can anybody tell me the frequency response of XM broadcasts. It is
general knowledge that the frequency response of FM broadcasts is
basically 30Hz-20KHz. In contrast, despite quite a bit of research,
I have been unable to locate any mention of XM's frequency response
whatsoever.

I would like to know XM's frequency response because I just bought a
Polk XRt12 Home XM Tuner, which is suppose to be one of the best XM
receivers available, yet I am extremely disappointed in its sound
quality. In addition to very poor stereo separation, the music is
completely washed out. Brilliancy is non-existent. The highs are
dull, and the midrange is muted. Even the human voices are muffled.

True, I have heard many negative comments regarding XM's compressed
signal. But I have also heard from numerous sources that XM
delivers near CD-quality sound. It is this significant discrepancy
of opinion that has led me to seek a quantifying answer to XM's
frequency response.

The very poor sound quality that I am getting out of my Polk
receiver puzzles me, because when I had the opportunity to listen to
XM's programming through a DirecTv system, the sound quality was
superb. Does anyone have an explanation for this great difference?

Your answers to these questions will be more than appreciate.

Bill Geluso