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cmattis
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"Noise" in speakers??

For some strange reason, I'm picking up a faint radio station signal in my rear channel surround sound speakers (Focal JM Lab). Does anybody have any clue what could be happening? Would a certain type of speaker cable help? This happens, by the way, when I'm watching T.V. or watching a movie.

ohfourohnine
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Re: "Noise" in speakers??

That's the voice of God chiding you for watching TV.

Yiangos
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Re: "Noise" in speakers??

lololol Clay !!!

Buddy,your system is picking up emi/rfi.First-of-all,check your cables,especially your rear speaker's,since there is the problem.If you have the speaker cables wound up(sorry my English is not good but i hope you know what i mean) this
acts as an antenna.Spread the cables,do not curl them up.
If this won't work,go to an electronics parts shop and get a few ferrite rings.This should do the trick.

cmattis
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Re: "Noise" in speakers??

Thanks very much, Yiangos, I'll definitely give these tips a try. I appreciate the help.

Yiangos
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Re: "Noise" in speakers??

No problem my friend.We'll all still be around if you still have problems.

Monty
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Re: "Noise" in speakers??

You may also be getting some bleed from the interconnects. If you have a tuner in your rack and leave it on, even when listening to something else, you can try turning it off. If this stops the bleed, but you want to leave your tuner on, try moving the interconnects to a different input.

If you don't have a separate tuner and are getting the RF from a receiver type of system, you can still move the input interconnects of the other components and my be able to find the leaking input.

In any event, I suspect the culprit is in the interconnect/input area and bleeding over.

cmattis
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Re: "Noise" in speakers??

Monty, could you please explain a little more what you mean by this? I actually do have separate components that I use mainly for listening to music (McIntosh tuner, McIntosh amp, McIntosh preamp), while my main receiver for T.V. and movies is my NAD. I never, however, leave the McIntosh tuner on. Anyway, I'm a little confused what you're talking about. Could you please explain in a little more detail? By the way, I just ordered some ferrite rings today. I hope they help?

Monty
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Re: "Noise" in speakers??

In some designs with poor circuitry shielding, the tuner section will bleed the signal over into another input or inputs. Often times, this happens with phono inputs. In many cases, the offending input is directly adjacent to an input that is being used for a different component and the leakage crosses over into the signal path of the component your are listening to.

I've had receivers and integrateds that I could hear a low level radio transmission during the cue-up of a turntable for example. With pramps or receivers with a dedicated phono input, you can't move the phono interconnect, but you can move the other line level interconnects away from the phono input. If you use an outboard phono stage, you can move it to any line level input and can often find a 'quiet' one.

The leakage could be introduced through the interconnect if the interconnect is not well shielded...or...could be introduced inside the circuitry of the receiver/amp. In either case, moving interconnects around to different inputs is free and easy to try and often helps.

Another cheap experiment is wrapping the interconnect with foil at the input. If this shields the interconnect and the leakage is eleminated, you can pretty well bet that a better shielded interconnect would likely do the trick.

If you are using different interconnects with the various components, you might simply swap one pair from one of the components and find that it shields better.

Let us know what ends up working. It's just another adventure that happens from time to time.

I almost forgot the easiest possible solution. Try disconnecting the tuner antenna and see if this helps.

cmattis
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Re: "Noise" in speakers??

Again, thanks very much for all this very useful information. I'll definitely try these recommendations. Your advice is much appreciated!!

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