Car Amp Grounding

dannyjmf · 11th October 2011, 09:43 AM

I've bought a car amplifier and their necessary cables and planning to install them inside my car. Now i am thinking about the amp grounding ....

Can i connect the ground terminal of the amp to the nearest part of the vehicle chassis .... or should i use a large gauge ground wire to connect it from the amplifier to the battery?

Any suggestions are very much appreciated. Thanks

brandes.cm · 11th October 2011, 01:25 PM

As short as possible to the chassis with a clean connection, no paint, no rust, and apply something to keep corrosion away once connected.

TheBaronGroog · 12th October 2011, 04:30 PM

Where's the battery? In some case going straight to battery will be better-most of the SPL guys will do a run to the battery as less voltage drop then to the chassis-only really a consideration with large power systems.

I sell car audio and my biggest issue with amps is poor earths-actually had one guy tell me the amp I sold him was POS and when I checked why it wasn't working he was trying to earth to MDF!

Generally straight to the chassis will work fine-just make sure it's a main part of the car and not a spot welded on pannel. Also make sure you sand back to bare metal and then drill through (making sure no brake/fuel lines etc are in the path) and bolt down, Some spray paint on the outside of the car and vaseline inside should prevent any corrosion.

11th October 2011, 09:43 AM	#1
dannyjmf diyAudio Member Join Date: Feb 2010 Location: Malaysia - Melaka	Car Amp Grounding I've bought a car amplifier and their necessary cables and planning to install them inside my car. Now i am thinking about the amp grounding .... Can i connect the ground terminal of the amp to the nearest part of the vehicle chassis .... or should i use a large gauge ground wire to connect it from the amplifier to the battery? Any suggestions are very much appreciated. Thanks

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11th October 2011, 01:25 PM	#2
brandes.cm diyAudio Member Join Date: Sep 2009 Location: Wisconsin	As short as possible to the chassis with a clean connection, no paint, no rust, and apply something to keep corrosion away once connected.

12th October 2011, 04:30 PM	#3
TheBaronGroog diyAudio Member Join Date: Aug 2011	Where's the battery? In some case going straight to battery will be better-most of the SPL guys will do a run to the battery as less voltage drop then to the chassis-only really a consideration with large power systems. I sell car audio and my biggest issue with amps is poor earths-actually had one guy tell me the amp I sold him was POS and when I checked why it wasn't working he was trying to earth to MDF! Generally straight to the chassis will work fine-just make sure it's a main part of the car and not a spot welded on pannel. Also make sure you sand back to bare metal and then drill through (making sure no brake/fuel lines etc are in the path) and bolt down, Some spray paint on the outside of the car and vaseline inside should prevent any corrosion.

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