Power conditioners or HU that has built-in protections?

[pokeyouindaeye]

Howdy, got a Gen2 Prius that has lots of background noise issues... with Car AV, is there anything like a power conditioner to ensure what's supplying the head-unit is clean power?

Or, any head units have good built-in power systems?

Got a Kenwoood KMM-X503 Excelon that I suspect has some bad circuitry, but if I bring it in for warranty and they put it on a clean bench power supply to test, I doubt they'll hear the issue.

Click to read more...

 

[pokeyouindaeye]

I was just doing some more Google-Fu and found this... Axxess AX-ANR1000 -- is this the kinda' thing that might help?

 

[pokeyouindaeye]

And what are battery isolators and relays for?

 

[Kickstand Premium Member]

Sounds like you have a bad ground or one of your wires is pinched behind the HU
Isolators are for running a second battery and relays are basically switches
Your headlights, wipers are examples of things that have relays

 

[pokeyouindaeye]

Sounds like you have a bad ground or one of your wires is pinched behind the HU
Isolators are for running a second battery and relays are basically switches
Your headlights, wipers are examples of things that have relays

Thanks for the ideas. I've tried just about every method of resolving the ground loop / bad ground issue for noise... thought the power lead filter (aka - in-line noise suppression filter) might be worth a shot... what you think?

 

[GTSQ]

Sometimes they work sometimes they don’t. Worth a try.
Here is a troubleshooting sheet.

https://images.crutchfieldonline.co...learningcenter/articles/417/NoiseSuppress.pdf

 

[metalheadjoe 10+ year member]

Audible noise is most likely related to audio signal. Do you notice it when you are listening to the radio? CD's? Bluetooth? Your deck gets solid power from your 12v battery. If you have 12v coming in and a solid ground, i would rule out your power supply.