bad engine whine through speakers
Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=106421
Printed Date: May 20, 2024 at 7:40 PM
Topic: bad engine whine through speakers
Posted By: bullseye753
Subject: bad engine whine through speakers
Date Posted: July 29, 2008 at 3:28 AM
As the title implies, I have very bad engine whine coming out of my speakers.. i just installed a jbl cs60.4. it sounds great when its loud, but as soon as the volume goes down the whine is awful. when i rev the engine the pitch goes up. Anyway i can stop this? Also, when i turn off my car, even when the volume is all the way down i get a huge thump out of the speakers. Are these problems related? -------------
Replies:
Posted By: i am an idiot
Date Posted: July 29, 2008 at 4:19 AM
My Crystal Ball tells me you have a Pioneer radio. It also tells me that the following webpage will help you get rid of the noise. https://bcae1.com/images/rca/temporaryrcashieldrepair.html The above WILL also fix Alternator "Wire" noise on certain JVC radios as well.
Posted By: bullseye753
Date Posted: July 29, 2008 at 7:44 AM
Good guess.. but wrong. i have an Alpine. -------------
Posted By: DYohn
Date Posted: July 29, 2008 at 8:20 AM
Engine whine in an amplifier is commonly caused by a ground loop. Read the grounding sticky post and be sure to measure your ground return resistance, you want it to be less than one ohm. Also, check that none of your RCA cables or speaker wires are damaged, and make sure your gain is not too high. ------------- Support the12volt.com
Posted By: forbidden
Date Posted: July 29, 2008 at 7:39 PM
If it still whines, ask it if it wants some cheese. After that threaten it with the metal recyclers and see if it starts to behave again. After all that, verify that you do not have a pinched rca cable somewhere or that if you have a crossover, the noise is not being induced there.
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Top Secret, I can tell you but then my wife will kill me.
Posted By: s_goodie
Date Posted: July 29, 2008 at 11:14 PM
you need to run your power the oposite side of your rca's going back to the amp and if you already do that you can get a box form walmart r a local car audio place that you put your rca's into that ends the whinning
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Stuey BABE
Posted By: DYohn
Date Posted: July 29, 2008 at 11:15 PM
forbidden wrote:
If it still whines, ask it if it wants some cheese. .
Rob, you should know that only works with Sony amps. Sony amps LOVE the cheese. ------------- Support the12volt.com
Posted By: spookiestylez
Date Posted: July 29, 2008 at 11:30 PM
I prefer a glass for my wine and cheese on the side.
sticky on grounding ------------- RTFM
Posted By: bullseye753
Date Posted: July 30, 2008 at 1:06 AM
makes sense.. i need to change the side of my rca's. haha whats all this "cheese" talk
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Posted By: s_goodie
Date Posted: July 30, 2008 at 1:55 AM
yeah its an easy fix jsut time consuming but i had the same problem ------------- Stuey BABE
Posted By: i am an idiot
Date Posted: July 30, 2008 at 3:54 AM
Have you tried turning the gains of your amp all the way down? If the noise goes away then, can you still achieve your desired listening level? If not turn the gains up till you hear the noise and then back it down till you don't hear it. Test again for desired level.
Posted By: bullseye753
Date Posted: July 30, 2008 at 12:32 PM
well there is no gain on the amp really, just input levels and those are set to 2V which is the output of my deck. I do have control however through the decks subwoofer adjustment because i have only one set of preouts which the sub amp and speaker amp are daisy chained. so when i turn this down to get no whine, the bass is not at my desired level. honestly i can live with the whine, ive adjusted somethings and its not as bad anymore, and i rarely listen to my music low so its not a huge problem for me. If it starts really ticking me off ill just switch the side of the rca's, and since ive taken my car apart probably 20 times in the 2 weeks itll probably take me 10 mins to do. I was looking at some eclipse h/u's and i noticed their voltage goes up to 8v. why is this better then say my 2v output? what are the upsides to having that. -------------
Posted By: DYohn
Date Posted: July 30, 2008 at 2:16 PM
bullseye753 wrote:
well there is no gain on the amp really, just input levels and those are set to 2V which is the output of my deck. I do have control however through the decks subwoofer adjustment because i have only one set of preouts which the sub amp and speaker amp are daisy chained. so when i turn this down to get no whine, the bass is not at my desired level.
Input level *IS* the gain control. You cannot go by the markings on any amp. Read the "How to set your gains" sticky post for a proper procedure. As far as "daisy chaining" amps, most amps with line-level outputs are simply pass-troughs and the input sensitivity (gain) setting on the first amp does not change the level of the signal being passed. You need to set both amplifier gain levels separately. ------------- Support the12volt.com
Posted By: i am an idiot
Date Posted: July 30, 2008 at 6:39 PM
Have you tried turning the input level of your amp all the way down? If the noise goes away then, can you still achieve your desired listening level? If not turn the input level up till you hear the noise and then back it down till you don't hear it. Test again for desired level.
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