Alternator Hum when accelerating (Honda Civic 2011)

[Andres1991]

I installed a aftermarket radio for my dad in his honda civic 2011, I get a noise that last for a few seconds then goes away when I start the car(Maybe just because it's an ebay no name radio), but the more annoying problem is the humming that increases when I press the gas pedal.

I have grounded the radio to itself instead of the factory wiring which has worked before on amplified systems, I have not had experience/installed radios with non-amplified systems that run the speaker wires to the radio instead of a amp like my volvo i had the same issue that was fixed by grounding the amp to the radio itself...

I just recently tried to tackle the problem with a "band-aid" 12v engine suppressor just now and the problem is still there which is getting annoying haha.

I wanted to ask the nice community here if it's safe to maybe ground the speakers wires together to the cars body instead of the radios ground wires? As I tried finding answers but could not find any.

The only ground problem i could possibly find is just those speaker wires, I have two RCA outlets and I tried to ground them out using some copper but they don't seem to be the problem either.

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[Boomin_tahoe 5,000+ posts]

The ever famous alt whine is usually caused by bad ground or RCA's.

 

[Andres1991]

The ever famous alt whine is usually caused by bad ground or RCA's.

Well everything seems well connected, the RCA ports are not being used I just figured they may be causing the issue. Everything is factory wiring, my connections are all soldered, all four speakers have this hum.