Quote:
Originally Posted by Patriks7
Hi guys,
I have been noticing the following issue ever since (I believe) I installed my new stereo - I don't think I hear it every time I'm driving, but there seems to be a slight whine coming, I believe from the speakers, specifically when I accelerate.
Video here, you can hear it slightly:
https://www.dropbox.com/s/xy1zr1xraq..._6965.MOV?dl=0
Any ideas what could be up? |
I'm not able to listen to your file, but the description matches a ground loop problem. If I remember from things I've read correctly, BMW uses a floating ground for their audio system, so if you introduce a piece to it, you'll be creating a ground loop.
If you've replaced the entire system, make sure not to use the BMW supplied ground wires from the harnesses, make your own. Use wire equal in size or larger than the power wire and attach it to a spot free of any paint. I use crimped on and soldered ring terminals.
Multiple audiophiles websites will strongly suggest every piece of equipment be grounded to the same point on the chassis to avoid loops, but I haven't found that necessary yet.