ground loop noise
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=92125
Printed Date: November 04, 2025 at 2:09 AM
Topic: ground loop noise
Posted By: 687246
Subject: ground loop noise
Date Posted: March 26, 2007 at 12:32 AM
hey, i am having horrible alternator noise and i have done all the regular things to troubleshoot it, reground amp, HU, and line driver. I also unplugged the rca's from HU and hooked up an ipod. this killed the noise, so i am fairly sure it is the Head Unit. Like I said, I have regrounded everything, and I have also metered them, all of my grounds read about 0.4 to 0.6 ohms. My only thought now is that the vehicle battery does not have a big enough, or sufficient ground, but i am not sure that makes sense.
I have a 2002 Mitsubishi Montero Sport. I am running an Eclipse CD-8053 HU, with a Balanced line adapter line driver that bumps the line voltage to 16v. that goes to a Rockford Fosgate Power Series T4004 4 channel amp that Pushes front stage MB quart Premium series components, and rear stage MB quart Discus series Coaxials. All of this is being powered by a red top optima battery, and I also have a Kinetic battery back by the amp. My amp and Kinetic battery are grounded in the same spot. I have pretty much ruled out faulty equipment because all of this was just taken out of my previous vehicle. any help or ideas would be greatly appreciated. THANKS!!!
Replies:
Posted By: 687246
Date Posted: March 26, 2007 at 1:16 AM
I just relized I never hooked up the antenna, therefore the headunit does not have its own chassis ground, could this be the issue?
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