update on alternator noise over speakers

[Roa, Greg]

First thing that I would do, is to disconnect your RCA cables from the amp,
to make sure that it is not noise that is being picked up by those.  I have
found that most of the time, the noise is picked up in the RCA cables, and
not in the power or ground cable.  If you power up the stereo, and have the
engine running, you should be able to hear if the noise is still coming out
of the speakers with no audio input.  If there is still noise, chase the
grounds, if not, go buy a good quality shielded set of insulated RCA cables,
and run them away from your other wires.  They will cost you a bit, but they
will last longer, and be quieter.

Greg Roa
Cincinnati, OH
'86 4kcsq
'93 90CS
'83 944



>From: "Griffon Financial" <tpsidders1 at netzero.net>
>To: "quattrolist" <quattro at audifans.com>
>Subject: update on alternator noise over speakers
>Date: Thu, 7 Dec 2000 19:28:11 -0600
>
>Hi all,
>I first of all want to thank all of you who replied to my first post.....
>After doing some rewirng and taking the advise of the majority of you whom
>said it was a bad ground, I have still not gotten rid of this damn
>noise....here's what I have done....I reground the head unit to the body of
>the car,  reground both of my amplifiers to the body using those star
>washers that dig into the metal. I have rerouted the 12v power from the
>battery so it does not run parallel with the RCA cables.
>    The remote/ ant lead(from the headunit)  which triggers the amps still
>run's parallel to the RCA's however, could this be the culprit???  One
>wouldn't think so, there isn't much voltage going through that wire.  At
any
>rate I need to somehow narrow this little shit down, Is this whine caused
>from my head unit not having a good enough ground or is it the amp grounds.
>Any help is appreciated!!!
>
>
>Thanks
tim