Frequency Response of XM
Geluso wrote:
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.
I think it's less than that. You could probably find more info by
searching the web or doing a little library research.
In contrast, despite quite a bit of research,
I have been unable to locate any mention of XM's frequency response
whatsoever.
See above.
You might also search the web and newsgroups (Google has that option)
for newsgroups devoted to XM and Sirius where you could find people who
might better answer your questions.
You could also try:
rec.audio.tech
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.
(snip)
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?
I'm just guessing, but the symptoms you describe (such as "muffled
voices") sound like maybe something in the Polk, in your cables, or in
your audio system is wired slightly incorrectly, making the audio
signal from your Polk XM tuner out of phase.
If the above is correct, I'd start by connecting the Polk tuner with
your system with another set of audio cables. If that doesn't fix the
problem, try connecting the Polk to your preamp or receiver at
different inputs.
You could also take the Polk to a friend's house and trying it there.
Maybe the best idea of all is to take the Polk back to your local
dealer and getting the dealer to start sorting out the problem.
How strong is the signal from the XM antenna? Could that be the
problem?
Your answers to these questions will be more than appreciate.
Bill Geluso
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