BUZZ sound from tv speakers!! HELP

The problem is probably not the wire you used provided that it is shielded and doesn't have any dry wall screws or nails driven through it.

The problem is most likely that you connected a device that is hooked to an outside antenna to an audio amplifier (or receiver).


First question - did you ever try this hookup (satellite receiver to audio amp) before?


I would spend my money on the ground isolator. They are so useful that I keep one handy at all times. You probably have what is known in the trade as a ground loop.

You are getting the buzzing, because of the cheap RCA cables which have no real shielding. It has nothing to do with a ground loop hum or a OTA antenna. Now of course, your only choice will be cutting into the drywall to pull out the bad cables, and run the new better quality.

Yes, I think that a ground loop Isolator is a good place to start. If you have grounding problems the video can contaminate the audio, which is what you seem to be experiencing.

No, not at all.


It has nothing to do with shielding.

Missed that...that's most likely due to failing components in the demodulator section of your receiver.
It can happen at the transmission side as well, but isn't likely.


DVD players don't involve a transmitter or receiver.

Try a new/different receiver.

Cheap cables have no shielding. Everyone on these boards are apt to jump out and tell people to go out and get some magic device/snake oil thinking that it will fix the problem, when it really doesn't.

...and others will tell you it's due to an 'impedance mismatch' or 'cheap cables', when that has no basis in reality. They'll never explain themselves either, because they really don't know what 'impedance' or 'electrostatic shielding' means.

It will not fix the
damaged or poor shield on the cables. Only way, is to replace with good quality cables.

How do you know there's a damaged shield?

You didn't happen to run your wires near a fluorescent light or dimmer switch?

As mentioned, this is a fault with the demodulator, or the modulator if you're using a ch3/4 output.

One of the more surprising factoids is that at audio frequencies and line levels, shielding often does not do a heck of a lot. It is primarily an advantage at high frequencies (e.g. above the audio band), with high impedance circuits (generally not used in audio) and/or very low level signals (e.g. the output of a microphone or turntable pick-up).

Some high end audiophiles even favor cables with no shielding or the shielding disconnected. Usually, no shielding does not hurt audio.


You've got some kind of grounding problem that is mixing some tiny bit of the video signal back into the audio. It might have not been the colors as such, but rather the changes in intensity that goes with changes in color, that was causing changes to the video signal that sound differently. The actual color in a regular coax video signal is not a big component of the signal.


The source of the noise in your audio was a grounding problem. DVD players usually have 2 conductor power plugs and are not grounded to your power wiring.


Satellite video cable is grounded for safety reasons. Its basically an outdoor antenna and therefore a good ground to deal with lightening and the like are a good idea.


Well thanks for the encourgement. I have advanced formal education, I've worked in many different technical areas within electronics for decades, and my experiences are highly varied. I've done electronics for years while wearing both blue and white collars. ;-)

Besides, I've had this very problem and fixed it, and not fixed it in many circumstances. Obviously, when the solution I suggested to you didn't work, the cause was that the problem was something else. Because of my technical training and the test equipment I'm fortunate enough to have, I've looked at many of these problems from a number of different directions.