Grounding explanation
http://www.bcae1.com/ground.htm
More info regarding ground loop isolators
http://www.bcae1.com/glisoltr.htm
ps. Grounding straight to the battery can introduce noise, grounding close to the Head Units grounding is often the best location.
Also, you should scrape away the paint on mid/high powered Amps, or even weld the ground straight to the chassis if the Amp is 1000w+
A bad ground can damage your Amp and introduce noise, so grounding is important.


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