Audio Help, Noob with noise

[SUBstandardSAM]

Hi Everyone,

Somewhat new to forums so sorry if I get anything wrong.

I'm looking for some help with an audio system on a 10m boat

I am getting very loud hum over the speakers when high powered led lights are on

I have a fusion head unit and 8 speakers, 2 amps.

I have tried re routing cables and also tried a cable moved away from the main cable runs with one speaker and everything else disconnected and still getting noise.

I have also tried an isolated power supply but that hasn't helped as I believe its noise from the led lights that are causing the problem.

I am going to try to run a spare rca cable across from the amp to the head unit tomorrow with just my one speaker connected and see if I still get the noise even when the cable is away from the led cables.

Just wondering if there is anything else I can try or if there is some grounding or suppression I'm missing.

Thanks in advance for any help!

 

[Arkless Electronics]

It's unlikely in the extreme that it could be radiated noise so it's probably a wiring issue.

Connect the audio gear DIRECTLY to the main battery + & - with no other connections to ground anywhere ie through the chassis of the unit to grounded metalwork. If this still doesn't work then I'd try using a second battery just for the audio gear with the connections as above. A switch/relay can be arranged to enable this battery to be charged from the main system.