Dear Sifu,

Recently have change my car audio player, but then i find out after change the have noise which is come from engine. How i test it ?

1) On the volume to 5, then start engine, heard sounds "~~ji....."
2) Then press petal, engine sounds louder, the "ji" sound will louder
3) I off the radio, start engine...dont have that "ji..."

Have any idea of this issue ? I try looking the shop person who install, they said memang will have bit sound d...
but previous player dont have this, so they maybe this watt is higher, so will have. Previous was 20W X 2 way, now was 62W X 4 way.

is that true ?

Maybe its a grounding connection problem..

might be grounding issue...most of the time is wiring...
btw what HU is that

If I'm right, that is ignition system interference noise. Its was a common problem since decades ago and solved by proper grounding and proper wiring, and most importantly the integrity of a noise suppression capacitor somewhere at the ignition system. Perhaps its there, perhaps its defective. An experienced ICE technician should be able to solve this.

between, im not understand what is HU means ? hahahha

your installer dont know what he doing la... just install one relay or capacitor and kao tim, no more 'aeroplane' noise

HU - Head Unit

This post has been edited by ericcc: Aug 13 2014, 05:00 PM

oh... then i need get relay or capacitor to reduce it...

should be not hard to install right ? do u know the cost of it ?

i have try google of the installation, but mostly it show the relay and capacitor install on the amp

wild guess will be wild guess....get urself a trustable installer to check on it and it save a thousand words...

you may close this one or ask mods to merge the topic reply

https://forum.lowyat.net/topic/3318869