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Message: <blockquote data-quote="ultimate157" data-source="post: 2592905" data-attributes="member: 566638">Error, wrong ...  Depending on the size of wire you are running. If you are using 4, 2, or 1/0 it is lower resistance to run a ground directly to the battery.A few tests have concluded that the average unibody vehicle has the resistance equal to a 4awg wire, and an older car will have rust and possibly holes in the body making the path of least resistance very curvy.Now ... Most of the time when playing music, the amount of amperage drawn will be less than playing test tones.  That is why grounding to the chassis with a 1/0 wire is just fine in the rear, so long as you have upgraded the chassis to battery ground to 1/0. (most stock battery to chassis ground wires can be as low as 8ga)</blockquote>

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