ground 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=23706
Printed Date: September 13, 2025 at 11:21 PM

Topic: ground noise

Posted By: rudbwoy69camaro
Subject: ground noise
Date Posted: January 01, 2004 at 12:08 PM

ARGH. I hate that high pitched "whizzing/whining" noise when you have the head unit on. I have a vehicle power inverter, and whenever it's on, I get that noise. I forgot the name....ground isolator? Please help me. Thank you in advance for your time.

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Replies:

Posted By: Reeceddogg
Date Posted: January 01, 2004 at 4:26 PM

I had the same problem in my car and the only thing that worked was moving the inverter away from the head unit with an extension.

Posted By: Teken
Date Posted: January 01, 2004 at 5:11 PM

Reeceddogg is correct in terms of the simple solution. The invertor needs to be relocated as far away as possible.

The AC power that is being generated from the invertor is being allowed to leak out. The excessive EMI / RFI is being radiated out, and inducing other wiring within your vehicle.

That is why some brands cost alot more than others, given the same STATED power output. What they lack is proprer shielding in the casing, and negative feed-back generation to reduce the amount of hum / noise coming off of the unit.

Regards

EVIL Teken . . .

Posted By: rudbwoy69camaro
Date Posted: January 01, 2004 at 8:18 PM

It's a vector. I bought one from Costco, a coleman one and that thing sucked. trying to watch a dvd on the laptop and we had an fm modulator to have in "stereo" and it had so much ground noise. the vector one wasn't that bad, that's why I kept it. So there is no such device I can put on the head unit to stop it?

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