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What is a Proper Ground? - the12volt.com
https://www.the12volt.com/installbay/forum_posts.asp?tid=49445#:~:text=To%20add%20to%20this%2C%20a%20good%20ground%20for,is%20adviseable%20to%20ground%20direct%20to%20the%20battery.
Ground resistance | Car Audio Forum | CarAudio.com
https://www.caraudio.com/threads/ground-resistance.415056/
measuring resistance is actually very easy all you need to do is a "voltage drop" test with a dmm. you power the circut up lets say you wanted to test the resistance in the ground from the battery to the chassis. place your dmm on dc voltage and place one lead on the battery negitive post and the other lead on the chassis next to the connection of the ground cable. is …
Audio Grounding Schemes - Basic Car Audio Electronics
http://www.bcae1.com/ground.htm
When an amplifier isolates its signal input ground connection from chassis ground, and uses the RCA shield coming from the signal source, it does not have the error which would otherwise distort the signal. Since an amplifier may amplify the signal 100 times its original level, any noise added to the audio signal will be a serious problem.
What is a Proper Ground? - the12volt.com
https://www.the12volt.com/installbay/forum_posts.asp?tid=49445
To add to this, a good ground for car audio applications will have a return resistance reading of 1/2 ohm or less. I have yet to have a return reading of 0 ohms. If a ground return reading cannot be made to get below 1/2 ohm by means of the "BIG 3", then it is adviseable to ground direct to the battery.
How to Create a Proper Ground - Sonic Electronix …
https://learn.sonicelectronix.com/how-to-create-a-proper-ground/
A “good ground” is a ground circuit that has a resistance of zero ohms; however this is rarely the case. If you’re handy with a digital volt/ohm meter, you can test the resistance of your new ground. If it has a return of ½ ohm or less you made a great connection.
How to Diagnose Automotive Electrical Ground Issues
https://www.onallcylinders.com/2019/07/24/how-to-diagnose-electrical-ground-issues/
Set the voltmeter to read ohms (resistance) and probe the battery’s negative stud and ground connection on the accessory (the ground terminal on an amp, for example). If you have a reading less than five ohms, the ground is okay. If the resistance is okay but the accessory still isn’t working right, set the voltmeter to DC current (voltage).
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