Have tweeter buzzing constant ONLY when car is in reverse,drive, or if I hit breaks in park

[trancemedia123]

I tried your suggestions of re grounding the 4 channel in the trunk to a better point (old ground=sheet metal sanded, new ground= factory ground near tire well with a thicker gauge wire) same problem. No idea what it could be ((

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[mahc 10+ year member]

What car? How old is it?

 

[trancemedia123]

What car? How old is it?

2012 chevy malibu but everythign is aftermarket

 

[mahc 10+ year member]

Do the big three upgrade if you have some extra wires or maybe your deck isn't properly grounded.

 

[trancemedia123]

Do the big three upgrade if you have some extra wires or maybe your deck isn't properly grounded.

I dont know how to do the big 3 upgrade and I am not running that much power to warrant it. I have a 100 watt mono amp and a 150 watt or something tiny 4 channel. All my speakers are low rms and so is my subwoofer. Its not a power build. I also dont want to spend my whole weekend self learning how to do a big 3 upgrade and doing it if the problem is still going to exist which im 90% sure it will.
I resoldered my ground and tried a new ground wire DIRECTLY to the battery terminal a while ago to see if it would cure it and it didnt.