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Install Garage & Help Desk You've got the radio, now which cable goes where? Got questions about factory installed radios in your car? Ask any installation or help questions here and someone will get to you soon.

 
 
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Old 01-03-2007, 03:26 PM   #1
07Camry
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Default New fix for speaker noise??

Ok, I am a novice so stay with me. I installed my S50 into my 07 camry aux port. I tried a radio shack ground loop isolator to rid the speakers of an awful noise but the sound sucks! A friend of mine gave me a little black thing "ferrites" that clamps onto the power wire. It is to be used with XM radio but he said it should work for sirius. I didn't have enough time to get the details so I am asking the pro's. What does it do? Will it work? Does it damage anything? Will I still need the ground loop?

THANK YOU!
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Old 01-03-2007, 07:01 PM   #2
sc173
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A ferrite is used to reduce noise. It should help out. You may or may not need the ground loop isolator after that, try it and see. It won't damage anything, but they are usually magnetic (usually pretty weak), so you wouldn't want to put it near anything that would be affected by it.

Ferrites are all over the place, you've just probably never noticed them before. They are that weird little cylinder shaped thing at the end of all your computer cables.

http://en.wikipedia.org/wiki/Ferrite_(magnet)

http://computer.howstuffworks.com/question352.htm
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Old 01-04-2007, 12:33 AM   #3
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Quote:
Originally Posted by 07Camry
Ok, I am a novice so stay with me. I installed my S50 into my 07 camry aux port. I tried a radio shack ground loop isolator to rid the speakers of an awful noise but the sound sucks! A friend of mine gave me a little black thing "ferrites" that clamps onto the power wire. It is to be used with XM radio but he said it should work for sirius. I didn't have enough time to get the details so I am asking the pro's. What does it do? Will it work? Does it damage anything? Will I still need the ground loop?
Ferrite cores are just bit of ferromagnetic material (usually powdered iron) subspended in a binder (a glue). In general ferrite materials become lossier as frequencies go up, so running a pair of wires through (or wound around) a ferrite core attenuates common-mode high frequency signals ("common-mode" means that the signals appears on both conductors, which is often the case for noise... the signal you want is generally differential, a positive voltage or current on one wire and negative on the either... this causes out much of the wanted signal's field, and thus isn't attenuated).

Unfortunately for you, ferrites of reasonable sizes aren't effective at audio frequencies. It is possible that there's really RF noise on your cables that later gets rectified into something audible (this is a common scenario with, e.g., high-power mobile radio transmitters), in which case the ferrites could help. So... my stance would be... no, it *probably* won't help, but it won't damage anything, so you might as well try them and see what happens (just be sure to borrow or purchase the ferrites from somewhere you can return them to without cost if it doesn't work).

---Joel
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Old 01-04-2007, 08:43 AM   #4
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XM sells these and he's clipping it on to his power cable so they obviously work. I just wouldn't expect miracles out of it. EMI and RFI are such oddballs that sometimes the weirest solutions help reduce interference. I still say give this a shot, you're out nothing since your friend gave them to you.

What kind of noise are you getting through your speakers? Static? Whining? What's your setup look like, do you have this hard wired to your stereo or are you using the FM Modulator?

Ferrites aren't going to help with static caused by using the FM Modulator.
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Old 01-04-2007, 11:03 AM   #5
07Camry
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Default Whining noise

Hmm hard to desrcibe the noise. It is a high pitched whining type/whirring noise. Not really a static at all. The ground loop isolator got rid of it all but was hoping to find something less abtrusive.

If i use the fm tuner the sound is not as good at ALL but i do not get the noise. I only get it from my camry's aux jack. Any ideas? UGH This sucks! I am wishing i had gotten a different model with a stronger fm tuner...what ya'll think?
Thanks again for all imput!
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Old 01-04-2007, 12:51 PM   #6
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Ok, I was just making sure the noise wasn't just static from the fm transmitter.

I'd say check the ground wire going into your car's stereo. Maybe it's loose or the wire is stripped somewhere.
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Old 01-04-2007, 02:44 PM   #7
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Quote:
Originally Posted by 07Camry
Hmm hard to desrcibe the noise. It is a high pitched whining type/whirring noise. Not really a static at all. The ground loop isolator got rid of it all but was hoping to find something less abtrusive.

If i use the fm tuner the sound is not as good at ALL but i do not get the noise. I only get it from my camry's aux jack. Any ideas? UGH This sucks! I am wishing i had gotten a different model with a stronger fm tuner...what ya'll think?
Thanks again for all imput!
Does the whining/whirring sound change at all with engine RPM? If it does, then it is most likely a ground issue, as stated by the others, and a ground loop isolator is just about the only fix without a LOT of diagnostics and possibly rewiring of your factory audio components.

My main question to you would be this: How "good" a quality is your patch cord between your Sirius and your AUX in? A good, high quality shielded cable is what you need, not one of those $2 cables from Radio Shack/Wal-Mart. Cheaper cables are a lot more susceptible to interference in my experience.
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