Alternator whine when powering roku [FIXED]

[ls1frc]

Hey all, got my new kenwood installed. I connected a 1080p basic Roku to it. When I power the Roku with the USB or a cigarette to usb adapter, I get bad feedback through the speakers. I powered it using an external battery with usb connector and the noise was gone.

Not sure how to fix this issue. Would getting a real power inverter resolve it ? Or do I need to run something directly off the battery into the truck?

 

[tom3]

Most aftermarket stereos used to have a noise filter in the power line. I'd guess about any car stereo shop would have one, ether new or a used one laying around. They do work. This would not be a ground loop isolator.

 

[Joseph Garcia]

As @tom3 suggested, first try a filter that you can purchase from an car audio shop.

 

[mikez71]

Could be your cigarette->usb adapter causing the noise. Saw a post not long ago about one causing problems..

 

[ls1frc]

I am not following on what filter to buy? I use all kinds of plug and play harnesses to get this system to work so I am not sure where a filter would go.

Also I tried two usb chargers, they're both no name brands so idk if buying a higher quality one will work

 

[Joseph Garcia]

I am not following on what filter to buy? I use all kinds of plug and play harnesses to get this system to work so I am not sure where a filter would go.

Also I tried two usb chargers, they're both no name brands so idk if buying a higher quality one will work

An inline filter that would go onto your 12v wire to the ROKU.

 

[ls1frc]

There is no noise using a power inverter, it is fixed now.

 

[Joseph Garcia]

Thank you for posting your solution to your issue. Our collective knowledge base has been increased.


Please add the word "FIXED" to your thread's title, to let others who are experiencing a similar issue know that this thread has an identified solution.

 

[ls1frc]

Updated