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Location:
New Zealand
Registered:
December 2004
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stereo alternator whine...help!
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Wed, 29 December 2004 09:38
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im my rolla ive got a pair of amplified 6.5" speakers and ever since theve been installed theve given off a whine thru the speakers directional porpotantioal 2 the revs of the car...ive lived with it 4 ages nw but since ive installed sum spotlights (more load on the battery) now the whine is unbareable....
any ideas? rcas? amp? a autoelectricion said the alternator is fine
cheers 
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Location:
Epping, Sydney
Registered:
April 2003
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Re: stereo alternator whine...help!
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Wed, 29 December 2004 09:40
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bad earth
(sorry cool1 stole your line!  )
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Location:
The Eastwood MASSIVE !
Registered:
May 2003
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Re: stereo alternator whine...help!
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Wed, 29 December 2004 09:42
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RCA's down the drivers side and power down the passenger side.
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Location:
New Zealand
Registered:
December 2004
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Re: stereo alternator whine...help!
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Wed, 29 December 2004 09:44
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bad earth? how would it b that?
umm the loom 4 the breaklights etc are down the right and so is my power wire...rcas are all on ther own down the left....
cheers
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Location:
Epping, Sydney
Registered:
April 2003
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Re: stereo alternator whine...help!
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Wed, 29 December 2004 09:52
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yeah you gotta keep your power away from your speaker cables,
where's your amp power wire? (biggest offender)
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Location:
New Zealand
Registered:
December 2004
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Re: stereo alternator whine...help!
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Wed, 29 December 2004 09:55
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the amp power wire is running down the right hand side with the break light looms...etc
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Location:
Epping, Sydney
Registered:
April 2003
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Re: stereo alternator whine...help!
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Wed, 29 December 2004 09:56
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I would be checking my earths
you can install those "isolator" thingys, but I have never had a problem if the install job is properly earthed and powered
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Location:
New Zealand
Registered:
December 2004
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Re: stereo alternator whine...help!
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Wed, 29 December 2004 09:58
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so ud recomend moving the earth and cleaning it up a bit......move the wires? or not nessary..
cheers
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Location:
Epping, Sydney
Registered:
April 2003
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Re: stereo alternator whine...help!
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Wed, 29 December 2004 10:01
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yeah, basically dude you gotta remember that your earth needs to be the SAME gauge as your power. It has to move the same amount of current.
Try a better chassis bolt or something?? I like seatbelt or seat ones.. they work well.
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Location:
New Zealand
Registered:
December 2004
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Re: stereo alternator whine...help!
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Wed, 29 December 2004 10:04
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yup my negative wire is the same gauge as the power wire...im pretty sure its on a seat belt botl but im not sure ill have a look 2morow and c what i can do. if thats not secessfull any other ideas ud recomend trying?
cheers man
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Location:
The Eastwood MASSIVE !
Registered:
May 2003
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Re: stereo alternator whine...help!
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Wed, 29 December 2004 10:06
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| DiZ_ wrote on Wed, 29 December 2004 20:42 |
RCA's down the drivers side and power down the passenger side.
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If your wires are not like this , you will get noise. You said they are on the left and right , but fail to provide a perspective to view the vehcile and assertain what sides left and right are.
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Location:
Epping, Sydney
Registered:
April 2003
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Re: stereo alternator whine...help!
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Wed, 29 December 2004 10:08
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good stuff, well dude I think it might be time for "neverfail" testing technique
get some speaker cable and run it along the outside of your car to the speakers and head deck and see if that eliminates the problem, then you will know for sure if it is a power cable problem or a power line affecting your speaker cable.
sounds like you know your stuff
these are just my ideas too from my experience... so there is probably better ones out there
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Location:
New Zealand
Registered:
December 2004
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Re: stereo alternator whine...help!
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Wed, 29 December 2004 10:15
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DIZ: my power is down the right hand side...drivers side and my rca's are down the left hand side..passenger side. swap?
rob: the problem only began when i amplified the speakers b4 that it was fine just the speakers had no balls... umm ok kan u just run that idea thru again? neva thaught of that...just wanna make sure im doin it properly
cheers
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Location:
The Eastwood MASSIVE !
Registered:
May 2003
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Re: stereo alternator whine...help!
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Wed, 29 December 2004 10:20
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Yes swap them over.
RCA's down drivers side
Power down passenger side.
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Location:
Epping, Sydney
Registered:
April 2003
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Location:
The Eastwood MASSIVE !
Registered:
May 2003
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Re: stereo alternator whine...help!
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Wed, 29 December 2004 10:23
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You and I are rather active tonight rob. 
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Location:
Epping, Sydney
Registered:
April 2003
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Re: stereo alternator whine...help!
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Wed, 29 December 2004 10:25
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rofl.. yeah I am like "QUICK! see if I can post before Diz_!" lol
cyberspace freaks... nerderising on the internet when we live like 3k from each other lol
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Location:
The Eastwood MASSIVE !
Registered:
May 2003
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Re: stereo alternator whine...help!
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Wed, 29 December 2004 10:27
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Thats alright , it's 9:30 which is my bed time.
And if you outpost me , don't forget , I know where you live 
At least , I kinda remember what street it might of been 
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Location:
New Zealand
Registered:
December 2004
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Re: stereo alternator whine...help!
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Wed, 29 December 2004 10:29
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ok sweet ill swap dem over 2mozzies
i wired in the head deck made sure everything was soldered and in connector strips hopefully its not sus but yea never no sweet thanks 4 that ill try dem all 2morrow and hopefully fix it! thanks guys!
i always thaught that the rca would b getting interferrd with and the amps ampin it and sending it on its merry way 2 become sound not the power wire :S
cheers
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Location:
Epping, Sydney
Registered:
April 2003
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Re: stereo alternator whine...help!
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Wed, 29 December 2004 10:29
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heheh lol yeah my mates house! go get 'im!
night night  howz ya exhaust anyway? ok.. wayyyyy OT
umm yes.. wiring... bad....and stuff
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Location:
The Eastwood MASSIVE !
Registered:
May 2003
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Re: stereo alternator whine...help!
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Wed, 29 December 2004 10:31
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lol , I have a new exhaust for the GZE.
So that old one I got from ya is gone the way of the dodo.
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Location:
Epping, Sydney
Registered:
April 2003
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Re: stereo alternator whine...help!
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Wed, 29 December 2004 10:33
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ah ah schweet
well it was fun while it lasted
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Location:
The Eastwood MASSIVE !
Registered:
May 2003
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Re: stereo alternator whine...help!
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Wed, 29 December 2004 10:36
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WEll come to dyno day ( which is very close to our houses , can you say hells yes ) and you will get to see it
TIME FOR BED NOW
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Location:
Epping, Sydney
Registered:
April 2003
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Re: stereo alternator whine...help!
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Wed, 29 December 2004 10:40
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oh yeah I'll be there! w00t!
night!
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I Supported Toymods
Location:
Sydney
Registered:
December 2002
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Re: stereo alternator whine...help!
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Wed, 29 December 2004 11:49
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It may not be alternator whine... it could be the injector pulse from the ECU doing it. Buy some higher quality RCA's or wrap some al foil around the existing ones to shield them a bit more.
Bad earth would not be a likely cause either as a bad earth will just make the amp distort at lower levels than it really should.
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Location:
New Zealand
Registered:
December 2004
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Re: stereo alternator whine...help!
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Wed, 29 December 2004 19:41
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hmmm yea that could b doing it...if i had a ecu lol shes carbd
good trick with the foil i mite just try that
cheers
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Location:
New Zealand
Registered:
December 2004
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Re: stereo alternator whine...help!
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Wed, 29 December 2004 21:24
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ok wellll i checked the earth and it looked fine but i moved it anyway 2 1 of the seatbelt bolts i cleand the tread up on it. i disconected the power wire and ran a new wire from the battery2 the amp and the whine still came thru.....just got bak from dwn town talkn 2 a guy at a car audio shop he seemed 2 think it was either my rcas (tried 2sell me a $100 pair of rcas!) or that a little diode in the alternatior had packed a sad and that was causing the sound....i then head 2 the auto electricion we disconned the alternator and no noise so its defianatily that he seemd 2 think maybe it was a poor earth in the dash 4 the head unit...or mybe my amp was crappy and didnt have the apporpiate noise filters....neway he said rebuilding the alterantor was gna accoplish nothing more than taking my $ away from me..... 
im kinda confused now any ideas any1?
any help would b great!
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Location:
Bundaberg, Qld.
Registered:
May 2002
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Re: stereo alternator whine...help!
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Wed, 29 December 2004 21:47
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| DiZ_ wrote on Wed, 29 December 2004 20:20 |
Yes swap them over.
RCA's down drivers side
Power down passenger side.
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how does that make any difference to what side of the car they run as long as they are apart.
what guage power wire do you have coming from the battery to the amp? do you have the equivelent size wires from the negative post on the battery to earth?
ever thought of putting a noise suppressor on the alternator?
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Location:
New Zealand
Registered:
December 2004
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Re: stereo alternator whine...help!
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Wed, 29 December 2004 22:32
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umm i fnk its 8guage its nice thick stuff anyway and the negaive is the same guage....yeah thats what i was wondering i dnt c how it would make any diffrnce at all
noise supressors are rare and expensive ive been around and asked no1 seems 2 no what they are or if they do oh yeah we had sum but they sold in a hour and we cant get anymore in.....dam
cheers
hints..........................
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Location:
Bundaberg, Qld.
Registered:
May 2002
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Location:
The Eastwood MASSIVE !
Registered:
May 2003
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Re: stereo alternator whine...help!
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Thu, 30 December 2004 06:44
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| feral4mr2 wrote on Thu, 30 December 2004 08:47 |
| DiZ_ wrote on Wed, 29 December 2004 20:20 |
Yes swap them over.
RCA's down drivers side
Power down passenger side.
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how does that make any difference to what side of the car they run as long as they are apart.
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No idea , I'm no audio engineer but I was told to always do it that way , and so far I have never experienced interference , even with cheapo RCA's , dodgy earth pionts ect ect
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Location:
Bundaberg, Qld.
Registered:
May 2002
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Re: stereo alternator whine...help!
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Thu, 30 December 2004 08:12
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when i was doing it as a job i always ran the power cable down whatever side the battery was on (whether it be left or right side of the car), as long as the rca's are run away from it. plenty of times i even ran the rca's down the center of the car too, used cheap ones like you have used as well with no problems. but most the comp guy's want all the flash ones that you hardly ever get to see... 
but i always upgrade my earths and make sure they all have a good connection to bare metal.
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Location:
New Zealand
Registered:
December 2004
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Re: stereo alternator whine...help!
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Sat, 01 January 2005 06:22
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yup i did crack out the sandpaper and sand down the paint i really really dont no what causeing this aye grrr its annoying at night!
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Location:
Sydney
Registered:
January 2003
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Location:
New Zealand
Registered:
December 2004
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Re: stereo alternator whine...help!
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Wed, 05 January 2005 08:21
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were would u find 1 of them?
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Location:
Perth, WA
Registered:
December 2004
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Re: stereo alternator whine...help!
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Wed, 05 January 2005 08:35
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hmmm, obviously one of your components is rooted, get a mate with all that gear to come over, and use their amp with your speakers etc to see whats causing the problem...
is it the same sort of whine as when you put a microphone up against a speaker?
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Location:
New Zealand
Registered:
December 2004
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Re: stereo alternator whine...help!
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Wed, 05 January 2005 09:25
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all the componets work fine never had a problem with anything just this whine yeah mite just do that aye swap sum bits about
cheers
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Location:
New Zealand
Registered:
December 2004
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Re: stereo alternator whine...help!
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Wed, 05 January 2005 09:26
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its a high pitched whisle really directly proportaional 2 the car revs
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Location:
Wollongong
Registered:
November 2004
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Re: stereo alternator whine...help!
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Wed, 05 January 2005 11:12
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| Ae92rolla wrote on Wed, 05 January 2005 20:26 |
its a high pitched whisle really directly proportaional 2 the car revs
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Electrical interference...
Check that the headunit is wired in correctly (Not just good joins, but the power wires are correct, and the earth is correct also)
Then check out the amp... For a quick bit of fun, remove the remote turn on, and give it constant 12+ve, the amp SHOULD come on permanently that way... Then try and see if the noise is there...
If you wire the amp in that way, does it stay on when the IGN is turned off? Because if it DOESN'T then the amp is wired in on ign cables and not constant...
I'd also check the cables LEAVING and GOING to the alternator... Make sure they are not frayed at all or rubbing on anything... As a second point, upgrade them to a thicker guage...
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Location:
Sydney
Registered:
January 2003
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Re: stereo alternator whine...help!
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Wed, 05 January 2005 13:48
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| Ae92rolla wrote on Wed, 05 January 2005 19:21 |
were would u find 1 of them?
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Used to be available at Dick Smith Electronics, it seems they like to sell more DVD playery stuff these days not all the electrical stuff, I guess it's where the money is....
Anyway more on topic try Jaycar(www.jaycar.com.au), or maybe Strathfield Car Radios(I doubt it though).
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Location:
New Zealand
Registered:
December 2004
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Re: stereo alternator whine...help!
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Wed, 05 January 2005 21:03
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the head unit is all wired in corectly and ive done it properly with the positives constants and negatives. the remote wire is run off the head unit so the amp only turns on when the head unit does...
all the alteranator wires are fine i looked at them and so did a autoelectricion he said dat the alternator is prefect
dick smiths hmm good point cheers il try that
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Location:
Canberra
Registered:
August 2003
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Re: stereo alternator whine...help!
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Thu, 06 January 2005 00:22
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Are the driving lights run off a relay? they should be, if they aren't the switch won't handle the current and cuase the problem you describe. Relays are your friend, any current drawing device should have one and source it's power from the battery/alternator lead.
Check your other accesories too!
oh yeah and Bad Earth. Is there any current drain on the battery with the ignition turned off?
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Location:
W.A
Registered:
October 2004
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Re: stereo alternator whine...help!
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Sun, 09 January 2005 09:20
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Been told old coils can cause interfernce dont know how much or how true it is? fo $50 or so maybe its worth gettin a brand new coil, if u already have a new coil rip the sistem out take to a stereo joint with a fitting warrenty if they fit it and its fine put it down to human error if it still makes the noise get them to source the cause under warrenty, its a small price to pay for your own sanity but it all depends, How anoying is this noise?
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