Stopping Engine noise Interference
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=27987
Printed Date: May 10, 2024 at 2:09 PM
Topic: Stopping Engine noise Interference
Posted By: bradsyukno
Subject: Stopping Engine noise Interference
Date Posted: March 08, 2004 at 3:20 PM
How does one cut down on the engine noise interference through the speakers. I heard running the power wire down one side of the vehicle and the RCAs on the opposite will stop a lot of it. The Interence did not come until I installed an after market cd player. Help please. ------------- Mr Hexed
Replies:
Posted By: forbidden
Date Posted: March 08, 2004 at 3:33 PM
Any chance that it is a Pioneer that you installed?
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Top Secret, I can tell you but then my wife will kill me.
Posted By: bradsyukno
Date Posted: March 08, 2004 at 3:35 PM
It is an Alpine CDA-9827 CD/Mp3/Wma Player. It is pretty damn sweet except I can't stand the F***ing engine noise.
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Mr Hexed
Posted By: forbidden
Date Posted: March 08, 2004 at 3:35 PM
What amps did you install and where are they grounded to and in what vehicle?
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Top Secret, I can tell you but then my wife will kill me.
Posted By: kgerry
Date Posted: March 08, 2004 at 3:36 PM
unplug your RCA cables, if you lose the engine noise use a ground loop isolator, there are lots out there like Scosche, Lightning, etc.
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Kevin Gerry
Certified Electronics Technician
MECP First Class Installer
Owner/Installer
Classic Car Audio
since 1979
Posted By: bradsyukno
Date Posted: March 08, 2004 at 3:43 PM
I have a sub output / preout on my alpine that runs to a Punch 60ix. The amp is grounded to the body underneathe the carpet. I am Driving a Yukon 2003. I currently have the RCAs for my subs running down the same side as my power wire, should seperate them? Would that help? What is a ground loop isolator and where can I research one? Brad Houston, TX ------------- Mr Hexed
Posted By: forbidden
Date Posted: March 08, 2004 at 3:50 PM
Definitely separate the power / ground cables from the rca cable. Reground the cd player to a new ground point as well. Try this and post up the results. The punch 60 is running a sub correct? And the Alpine cd player is running the factory speakers. If you unplug the rca cable does the noise go away and what speakers does the noise come from. Is this Yukon a Delco Bose system?
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Top Secret, I can tell you but then my wife will kill me.
Posted By: bradsyukno
Date Posted: March 08, 2004 at 4:07 PM
The Yukon has a bose system in it now. I had the 2-12" subs running off the Factory headunit at first and there was no interference then. I had a pac converter hooked up to the factory headunit to run my subs. The interefence only came when I hooked up the Alpine The Punch Amp is running 2 - 12" subs and the Alpine is running everything else. I had to install a Bose amp converter in order to install the Alpine. ------------- Mr Hexed
Posted By: bradsyukno
Date Posted: March 09, 2004 at 8:49 AM
The noise is coming through both my subs. I re-routed the sub's RCAs on the opposite side from the power and I still have the interference. When the radio is playing I unplug the RCA for the subs and the interference goes away. How can I stop the noise from coming through my subs.
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Mr Hexed
Posted By: Ravendarat
Date Posted: March 09, 2004 at 8:55 AM
It sounds like you have a bad ground to me on the amp, if I understand you right. The noise is ONLY comming through your subs and it goes away when you unplug the RCA's right. If thats the case than the two easiest fixes are first off try regrounding the amplifier to a clean piece of bare metal. If it still continues try to run a new pair of rca's just over the carpet to the amp and see if that fixes it. If the noise goes away you have a pair of faulty rcas and just replace them.
Posted By: bradsyukno
Date Posted: March 09, 2004 at 9:21 AM
Yes, the noise is only coming through the subs. while playing I turn my bass control up and the noise gets louder, down and it gets quit. I thought that may be part of the problem so I unplugged that and it did not help. The only time the noise goes away is when I unplug the RCAs. I will try regrounding the amp once again. I would think if the amp was not grounded good enough, it would play at all. Do you see this problem offten? ------------- Mr Hexed
Posted By: Prophit
Date Posted: March 09, 2004 at 12:31 PM
I would check the ground on your deck.
Posted By: bradsyukno
Date Posted: March 09, 2004 at 12:56 PM
I checked that yesterday and I did not see a ground lead coming off the Deck. I am not sure exactly were the ground lead should be attached to the deck also. It shows that the ground lead should be connected in the manual but not specifically where exactly.
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Mr Hexed
Posted By: bradsyukno
Date Posted: March 09, 2004 at 1:22 PM
Matter of fact I don't think that I have ever seen a ground lead attached to the Actual head unit. I know in the wiring harness that comes out of the HU has a ground wire with in it. The only other place to ground it would be the case of the HU.
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Mr Hexed
Posted By: bradsyukno
Date Posted: March 10, 2004 at 8:45 AM
I re-grounded my amp and I am still getting noise through my subs. I have checked everything I know and it won't stop. I ran new RCA and that didn't work. What else is there to do to stop this. There has to be a solution. I am using a Coustic XM3e crossover which should filter some of the noise out. When I had my stuff installed the tech hooked in to my ignition wire to server as the remote for my amp and Xover. Would that cause a problem? ------------- Mr Hexed
Posted By: kgerry
Date Posted: March 11, 2004 at 10:00 AM
no... you either have an open ground in the audio stage of one of your components or you have a ground loop problem... bypass the x-over and see if you still have the same problem, if you do then go out and buy a ground loop isolator from an install shop.....
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Kevin Gerry
Certified Electronics Technician
MECP First Class Installer
Owner/Installer
Classic Car Audio
since 1979
Posted By: bradsyukno
Date Posted: March 11, 2004 at 10:14 AM
While my car is running I am getting noise through my subs even when my Deck is off. When tured on it is louder, when Bass is turned full and deck volume down, interference louder as well. I bought one and hooked it up and it stopped the engine noise but it also killed some of my bass. I reasearched the isolator and found it will cause you volume of bass to be less when using the isolator. That problem only occurs when using an older amp, late 80's early 90's. My amp is about ten years old. The install shop used the ignition wire as the remote wire before I installed the Alpine. Do you think that may cause it? ------------- Mr Hexed
Posted By: customsound
Date Posted: March 11, 2004 at 10:51 AM
kgerry wrote:
unplug your RCA cables, if you lose the engine noise use a ground loop isolator, there are lots out there like Scosche, Lightning, etc.
just like he said use a ground loop isolator it will help
Posted By: kgerry
Date Posted: March 11, 2004 at 11:03 AM
no using the ign as a remote turn on, the only problem is that if you are getting engine noise there is no way to shut off the amp since it is remoted on when ign is on, put in a throw switch to shut off the remote feed to the amp or else use a switching device to turn the amp on proerly, like DEI's 55000 which takes an AC signal from a speaker wire and converts a 12V DC turn on voltage... they work great when wiring an amp to a factory head unit that does not have a remote out voltage.
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Kevin Gerry
Certified Electronics Technician
MECP First Class Installer
Owner/Installer
Classic Car Audio
since 1979
Posted By: hammondc
Date Posted: March 11, 2004 at 2:27 PM
is there a supressor for alternator whine? I have a little I would love to lose. all power and signal cables are separated.
Posted By: harvey1959
Date Posted: March 12, 2004 at 2:04 AM
Is your head unit connected to the speakers using the speaker wire from the HU and the Subs connected to the HU using the RCA jacks. If so then you're using Low level and High level output at the same time and you can't do that. Try disconnecting your full range speakers and just leaving the RCA's hooked up and see if the Subs still have noise in them. ------------- Harv
Posted By: hammondc
Date Posted: March 12, 2004 at 8:19 AM
Set up is as follows. All amplifier driven. Also, it is worst when defrost is on. Alpine CDA-9833 | | | Eclipse PA5422 : 4 Channel | | CDT HD-62 Splits up front | | Alpine SPR-694 : 6x9 in back | | | HiFinics Zeus Series VII | | (2) Kicker Solo-Baric 10's | | 1 farad Cap | | | All streetwires Zero-Noise 3.0 Interconnect | | Stinger HPC Power Cable (4ga to distr block, then 8 ga to amps) |
Posted By: harvey1959
Date Posted: March 12, 2004 at 9:28 PM
I'm sorry Hammondc, my previous reply was a suggestion for Bradysukno to try. As far as your setup is concerned I believe different places actually sell alternator noise suppressors that attach to the main power cable.
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Harv
Posted By: customsuburb
Date Posted: March 13, 2004 at 12:16 PM
hammondc try this. Bradysukno tru using one of these on the power line going to your head unit. Noise filter
Posted By: Alpine Guy
Date Posted: March 13, 2004 at 10:57 PM
i bet you a hundred bucks that if you switch that remote turn on wire from the ignition to the actual remote turn on on the deck it will all go away. In every car that i have done an install in that required me to use ignition as the amp turn on, i have had engine noise. Thats all it is, i can't believe on one has said this yet.
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