Alot of Ground Noise 72’ Cutlass

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=55985
Printed Date: May 11, 2025 at 5:43 PM

Topic: Alot of Ground Noise 72’ Cutlass

Posted By: D-boh
Subject: Alot of Ground Noise 72’ Cutlass
Date Posted: May 18, 2005 at 4:39 PM

I have a 1972 Cutlass 4 Door. In it I have a Pioneer DEH 3500 HU and off of that I have a 300 watt Boss amp bridged running 2 Boss SPL 12"s. The ground noise is very loud even when the car is Idling. I custom installed the HU and it is grounded very well below 0Ohms. I have the amp grounded on the chassis in the trunk using about 3ft wire. I have also tried other placed and the same problem occurs at the same rate. I sanded the spot for the connection to the chassis. I ran the power wire away from the rca also.. Any help would be appreciated, Thanks

8 Ga power 8 Ga Ground

-------------
A T L
Alpine/JL Nothin but the BEST!

Replies:

Posted By: jstruckman
Date Posted: May 18, 2005 at 4:46 PM

Have you checked the resistance of the ground point of your amps (referencing back to the battery)? I am sure those Boss amps dont have much for isolation and noise suppression design.
Also, you cant have below 0 ohms of resistance as you state your head unit has.

Jazzy

-------------

Posted By: D-boh
Date Posted: May 18, 2005 at 5:18 PM

Thanks for your input the 0ohms was for the last HU I had in the car