Sounds to me like you have a ground loop. You can get something called a
'ground breaker' for your CATV cable. It will break the ground loop
which causes 60Hz humming in your speakers.

  The reasoning is this: There is no 'perfect' ground, so each major
circuit has its own. Your CATV ground may be located 200 meters away
from your home, but your AC ground is about 5 meters away. If there is a
very small difference in the voltages, you have a circuit, and the most
noticeable result is 'speaker hum.' I have noticed this in many houses.
If you ever install car radios, you will see it there, too. Same reason.

Chris

>
> >The soundcard is a soundblaster PnP 16.  I've tried both outputs, the
> >speaker out and the line out with the same results.  I originally had it
> >plugged into the speaker out.  On the stereo end I have it plugged into
> >the VCR input, which is where I had it before also.  The connecters are

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