Hi all so on my 07 I have gutted the original ice and installed new head unit and amp with original wiring.

All worked lovely for a couple of years but ive had to have it all out over the last few weeks now no matter what I do I get this annoying noise from the speakers, it does it in yep position two and running , it’s not alternator whine as ot is identical running to not and doesn’t change when driving…

Any ideas it’s doing my head in…

 Current stable:
2006 BMW M6
2007 4.2 V8 S/C FF
Gone:
2002 4.4 V8 FF

Sorted it was an issue with the rca lead in the end should anyone ever get similar Current stable:
2006 BMW M6
2007 4.2 V8 S/C FF
Gone:
2002 4.4 V8 FF