engine noise from speakers

[ika]

I just retrofit obc + tv on 2004 x5 4.4.
but i have some some engine noises from speakers.
what to do?

[lo_jack]

Make sure everything is grounded really well. Also make sure you did not run any signal lines next to power cable. Usually noise problems like that are a grounding issues.

[ika]

I put wiring along power cable coming from trunk. By manual I have to put along existing wiring. I will check maybe I can put far away from power red cable.