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Dash Dims when sub kicks.

King_berald

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hey guys....just installed my new stereo....i had the car running and started playing some music, and noticed that everytime the sub kicked, all the lights on the dash would dim a fair amount......does this mean i have an electrical fault? or do i need to upgrade my alternator or something?
 

Philthy

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Upgrade your earths. There is a thread floating about somewhere that will show you how

Search "big 3" or simply "earth upgrade"
 

King_berald

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i was going to ground the negative battery terminal to the chassis.....but is this going to be a bare minimum fix?
 

Philthy

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Its a good start. Use at least 4g cable, sand back the paint, and lately I have been using "wire glue" from jaycar on my earths as well to seal them up
 

sweefu

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Plus ensure your amplifier earth is the same as philthy said, well sanded back etc. Make sure you power cable is up to the job too. If your amp terminal accepts 4awg - give it 4awg.

My last stereo ran 1260wrms on stock altenator and battery with no dimming anywhere at all.
 

Fun_Bucket

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hey guys....just installed my new stereo....i had the car running and started playing some music, and noticed that everytime the sub kicked, all the lights on the dash would dim a fair amount......does this mean i have an electrical fault? or do i need to upgrade my alternator or something?

If you gave us some more detail, such as a full list of the components you are using, then we would be more likely to be able to tell you what upgrades would benifit you the most.

And no, a capacitor will not fix the issue.
 

King_berald

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oh sorry....i got 6.5" type R splits in the front doors....6.5" typr R coaxs in the rear....and a 500watt rms type R sub....i have a 500watt monoblock and a 1320watt 4 channel...
 

sweefu

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oh sorry....i got 6.5" type R splits in the front doors....6.5" typr R coaxs in the rear....and a 500watt rms type R sub....i have a 500watt monoblock and a 1320watt 4 channel...

Plus ensure your amplifier earth is the same as philthy said, well sanded back etc. Make sure you power cable is up to the job too. If your amp terminal accepts 4awg - give it 4awg.

My last stereo ran 1260wrms on stock altenator and battery with no dimming anywhere at all. Have you checked all this stuff mate?
 

King_berald

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i have sanded patches under the rear seat to bare metal then got a terminal with a copper washer and used a self taping screw into the body....is there any other ways that would be better?
 
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