High Pitched Squeel When I Accelerate... - BMW Forum - BimmerWerkz.com
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#1 (permalink) Old 01-11-2005, 09:47 PM
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I have a '94 318is. I have an Alpine 9835 HU, 5/14 MB Quart Reference components up front, JL audio sub, and JL audio amp. A few months ago, I was listening to a weak AM signal and notice that there was a high pitched squeel when I accelerated. It only happened when I listened to weak AM signals which is rare so I forgot about it. This never happened when listening to CD's or FM.

Anyway, I just had the Sirius direct connect tuner installed today, and whaddaya know, I have a high pitched squeel when I accelerate. It is most noticeable when I listen to talk, but it happens on most stations--rock, talk, etc.--it is harder to hear on a loud rock song but it is still there--I called the installer and I will be taking it back on Thursday--I asked him if he thought it was a grounding issue, or cable shielding issue and he said--is he wrong? Or does anyone else have any ideas? I want to be armed with knowledge when I take it back. By way, other than the squeel, it sounds great--I highly recommend it.

Thank you.
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#2 (permalink) Old 01-11-2005, 10:04 PM
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this thing happend to me when I smoked some tires at the light and launched my car, turned out my ground cable came loose from my amp, chk that, we never know...


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#3 (permalink) Old 01-12-2005, 12:32 AM
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yeah, my friend said that if you can hear the sound of your engine through your speakers when accelerating (which in your case the squeel) it's most likely that you grounded your HU to your car's stock ground wire instead of getting like another ground wire... i don't think HU ground wire, then that's why it's happening


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#4 (permalink) Old 01-12-2005, 12:40 PM
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Yea it tis very common with custom head units, Your head is def. picking up your engine vibro's. A noise filter connecter should do the trick, you can get them at any audio store like radio shack or something....

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#5 (permalink) Old 01-18-2005, 03:29 PM
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Quote:
Originally posted by Red_Rocket@Jan 12 2005, 12:40 PM
Yea it tis very common with custom head units, Your head is def. picking up your engine vibro's. A noise filter connecter should do the trick, you can get them at any audio store like radio shack or something....
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I just got all of my system put in and i had that and they put filters in too, but also it could be alternator wine....
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#6 (permalink) Old 01-19-2005, 03:23 AM
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Between a squeal and a whine I have now come to the conclusion that your problem is listening to Jessica Simpson!!!
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#7 (permalink) Old 01-23-2005, 11:44 PM
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Quote:
Originally posted by PMB@Jan 19 2005, 02:23 AM
Between a squeal and a whine I have now come to the conclusion that your problem is listening to Jessica Simpson!!!
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anyone know how to solve this problem without noise filters, cause i put them on, but it didn't do anything just made it a little less evident, that and they rob you off power too, so they are pretty crappy to have. but they didn't really help. so any suggestrions on how i should stop this.?

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#8 (permalink) Old 01-23-2005, 11:54 PM
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try different grounding locations and make sure all your grounds are solid.

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#9 (permalink) Old 01-24-2005, 12:36 AM
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Quote:
Originally posted by YoungExec728@Jan 23 2005, 10:54 PM
try different grounding locations and make sure all your grounds are solid.
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alrighty sounds good, ill give it a wirl, i thought about it, never actualy did that....

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#10 (permalink) Old 01-24-2005, 06:29 AM
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If that does not work, try connecting a wire from the positive input to your amp to the positive input of your HU. You may also like to try negative to negative too.

In the same way as you get grounding issues you get power issues. This sounds more like a power issue.
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#11 (permalink) Old 01-24-2005, 01:38 PM
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Quote:
Originally posted by PMB@Jan 24 2005, 05:29 AM
If that does not work, try connecting a wire from the positive input to your amp to the positive input of your HU. You may also like to try negative to negative too.

In the same way as you get grounding issues you get power issues. This sounds more like a power issue.
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it rises and falls with the rpms, and its somtimes there and somtimes not, and its on some radio stations more then others.

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#12 (permalink) Old 01-25-2005, 03:28 AM
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Check your antenna, that could be causing the ground loop
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#13 (permalink) Old 01-25-2005, 03:29 AM
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Check your antenna, that could be causing the ground loop
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