battling ground loop
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=128300
Printed Date: May 01, 2024 at 6:21 AM
Topic: battling ground loop
Posted By: sullivan91
Subject: battling ground loop
Date Posted: August 21, 2011 at 1:21 AM
recently upgraded my whole system, im getting an alt. whine throughout my speakers only when I plug in my RCA interconnects for the sub amp.
Im stuck, the amp has a great ground, wonderful power, great signals and wire connections...
running everything off rcas on a pioneer 4200dvd
Replies:
Posted By: i am an idiot
Date Posted: August 21, 2011 at 8:36 AM
Posted By: sullivan91
Date Posted: August 21, 2011 at 2:19 PM
i am an idiot wrote:
https://bcae1.com/images/rca/temporaryrcashieldrepair.html
Im not having this issue with the other 2 RCA's though.
Im going to reground my amps and my headunit, also can you tell me if im not doing something right with my power.
I have 1 100amp midi fuse at the battery, and in the rear I have a distribution box, with 2 100amp midi fuses going to two different amps.
It seems to be drawing a lot of juice, any reason?
Posted By: lspker
Date Posted: August 21, 2011 at 9:57 PM
You have not provided any where enough information to begin to answer your questions........
If you are running multiple amps, which I an assuming you are doing, it is possible that the amps are not completely campatible with each other, ( input resistances are to far apart).
More likely, if the amps are new, you may have a bad rca, or blowen ground on just the sub out. You could try on of those old isolation filter on the sub amp, or the suggestion above.
Posted By: sullivan91
Date Posted: August 22, 2011 at 4:58 PM
Ground loop issue is fixed now, it was a bad headunit ground.
Now as for my power issue, my truck seems to struggle to start for some reason. I had everything powered and it was draining my battery when I came to a stop and my voltage would drop to about 10 to 11 Volts. When I started driving it would return to the normal 14.1 volts it usually reads.
I disconnected one of the amps, but it continues to struggle now.
Going to hook up the battery charger to it and see if it starts fine. If it does then I guess its my battery thats gone bad. Its a duralast goldtop
Posted By: chadpcb
Date Posted: August 24, 2011 at 3:32 PM
Just went through the same problem with my 98 Dodge Dakota.
Found out the battery was going bad.
Have your battery checked out.
Posted By: sullivan91
Date Posted: August 25, 2011 at 10:18 PM
My battery was bad, got a new one and all is good.
Thanks man, but still when I stop I have to turn the bass down or my voltage starts to drop a ways.
Posted By: dragon51
Date Posted: September 01, 2011 at 11:37 AM
Time for the Big 3. When I was younger I burned up 3 alternators from running too much power.
Now that I am older I have a perfectly good fosgate 1000.1bd amp I wont use in my wife's honda crv since I know her charging system won't hold it.
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