Getting whine out of car sound system

[TubsAlwaysWins]

Ok so my car sound system has some wicked alternator whine. I know its coming from my head unit, not my amps (all my speakers are on amps). I know because whenever I unplug the RCA's from it it goes away. Ive tried things like RCA grounding and such. Anyone know how I can get cleaner power going into my head unit? Im not sure if its coming from my constant 12V or my ACC 12V

 

Like if I put a capactior or something in line with it?

 

It also gets worse when I break

[Stagea]

You can install a noise suppressor on both constant and accessory power lines if you feel that the noise is coming from the power side.

 

Example:

https://www.amazon.com/Magnum-XLF-20BP-Common-Power-Filter/dp/B01IC27LHW

 

You can also try installing RCA ground loop isolators.

 

[TubsAlwaysWins]

21 minutes ago, Stagea said:

You can install a noise suppressor on both constant and accessory power lines if you feel that the noise is coming from the power side.

 

Example:

https://www.amazon.com/Magnum-XLF-20BP-Common-Power-Filter/dp/B01IC27LHW

 

You can also try installing RCA ground loop isolators.

 

OK thanks ill try that

[Stagea]

37 minutes ago, TubsAlwaysWins said:

OK thanks ill try that

You're welcome. Make sure that all the grounding points are good too. Alternator whine can be very difficult to diagnose at times.