Alternator whine with stereo off.......?
10-23-2011, 11:10 AM
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Le Mans Master
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Alternator whine with stereo off.......?
With my stereo off, I get alternator whine. Any ideas why and how to fix? Thanks 
Well, attached the GLI's to the RCA's at the AMP and no more whine!
Well, attached the GLI's to the RCA's at the AMP and no more whine!
Last edited by Kensmith; 10-23-2011 at 04:09 PM. Reason: UPDATE
10-23-2011, 12:02 PM
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St. Jude Donor '12
Did you ground negative side of rca's to head unit? Did you install any ground loop isolators? Did you install an antenna isolator? Any of the preceding, or combination thereof, should resolve your problem.
10-23-2011, 12:10 PM
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Le Mans Master
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So even with the stereo off I need GLI's on all the RCA's? I didn't think with power off I would get alternator whine. I do know the installer ran the RCA's close to the main power junction block at the rear of the center console.
10-23-2011, 03:30 PM
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St. Jude Donor '12
I successfully eliminated all whine from my system by grounding the interconnects to the chassis of the head unit and by adding an antenna isolator (with adapters). No whine and no need for a ground loop isolator!
If you have access to the back of your head unit and if you have some wire, try grounding the interconnects. You may not need the GLI.
If you have access to the back of your head unit and if you have some wire, try grounding the interconnects. You may not need the GLI.
10-23-2011, 03:39 PM
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I successfully eliminated all whine from my system by grounding the interconnects to the chassis of the head unit and by adding an antenna isolator (with adapters). No whine and no need for a ground loop isolator!
If you have access to the back of your head unit and if you have some wire, try grounding the interconnects. You may not need the GLI.
If you have access to the back of your head unit and if you have some wire, try grounding the interconnects. You may not need the GLI.
Did not have to ground the GLI's.
10-23-2011, 07:56 PM
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St. Jude Donor '12
That's what can happen when one uses a GLI. Some people are adamant that they do not degrade sound quality. Ohers confess that they do degrade sound quality, but that they are a necessary evil.
I tried three different GLIs and found that they all degraded sound quality to some extent (some more than others). The last one I tried was the best, but I was able to resolve my whine issue without them so I refrained from making them a part of my install.
I tried three different GLIs and found that they all degraded sound quality to some extent (some more than others). The last one I tried was the best, but I was able to resolve my whine issue without them so I refrained from making them a part of my install.
10-23-2011, 11:46 PM
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That's what can happen when one uses a GLI. Some people are adamant that they do not degrade sound quality. Ohers confess that they do degrade sound quality, but that they are a necessary evil.
I tried three different GLIs and found that they all degraded sound quality to some extent (some more than others). The last one I tried was the best, but I was able to resolve my whine issue without them so I refrained from making them a part of my install.
I tried three different GLIs and found that they all degraded sound quality to some extent (some more than others). The last one I tried was the best, but I was able to resolve my whine issue without them so I refrained from making them a part of my install.
10-24-2011, 12:06 AM
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St. Jude Donor '12
of the three GLIs that i tried on my system, the best one was a PAC SNI1 Noise Isolator. the worst one was from Radio Shack. the one that i bought from a local car audio install shop (i forgot brand name and that GLI is currently in storage) was not much better than the one from Radio Shack.
another thing you can try is to press the voice control button on the steering wheel and ask for help (or whatever the command is) to get the car to talk to you. this will give you a consistent sound that you can compare.
with the really bad GLIs, i also found it was near impossible to hold a conversation using blue tooth... the distorted poor sound quality from the speakers drove me nuts.
please post your results.
another thing you can try is to press the voice control button on the steering wheel and ask for help (or whatever the command is) to get the car to talk to you. this will give you a consistent sound that you can compare.
with the really bad GLIs, i also found it was near impossible to hold a conversation using blue tooth... the distorted poor sound quality from the speakers drove me nuts.
please post your results.
10-24-2011, 12:25 AM
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of the three GLIs that i tried on my system, the best one was a PAC SNI1 Noise Isolator. the worst one was from Radio Shack. the one that i bought from a local car audio install shop (i forgot brand name and that GLI is currently in storage) was not much better than the one from Radio Shack.
another thing you can try is to press the voice control button on the steering wheel and ask for help (or whatever the command is) to get the car to talk to you. this will give you a consistent sound that you can compare.
with the really bad GLIs, i also found it was near impossible to hold a conversation using blue tooth... the distorted poor sound quality from the speakers drove me nuts.
please post your results.
another thing you can try is to press the voice control button on the steering wheel and ask for help (or whatever the command is) to get the car to talk to you. this will give you a consistent sound that you can compare.
with the really bad GLIs, i also found it was near impossible to hold a conversation using blue tooth... the distorted poor sound quality from the speakers drove me nuts.
please post your results.
10-24-2011, 12:43 AM
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St. Jude Donor '12
In my detailed install thread I did mention that I thought those were the best, but this place is a knowledge base that builds upon itself.
I found very little, if any, degradation in sound quality using the PAC SNI1, but decided against using that GLI as a part of my install because I could eliminate the whine / squeal without them.
GLIs are considered a last resort and a band aid. The vette has a strong proclivity for whine so GLIs are commonly used.
If at all possible, you should avoid using a GLI.
I found very little, if any, degradation in sound quality using the PAC SNI1, but decided against using that GLI as a part of my install because I could eliminate the whine / squeal without them.
GLIs are considered a last resort and a band aid. The vette has a strong proclivity for whine so GLIs are commonly used.
If at all possible, you should avoid using a GLI.
Last edited by kedar; 10-24-2011 at 12:45 AM.
10-24-2011, 11:33 AM
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I successfully eliminated all whine from my system by grounding the interconnects to the chassis of the head unit and by adding an antenna isolator (with adapters). No whine and no need for a ground loop isolator!
If you have access to the back of your head unit and if you have some wire, try grounding the interconnects. You may not need the GLI.
If you have access to the back of your head unit and if you have some wire, try grounding the interconnects. You may not need the GLI.