Help with stereo noise

[all wired]

its sounds like the problem is coming from something that powers with ignition. MSD boxes and fuel pumps can definitely create noise. I would recommend turning the ignition on (so that the noise is present), then disconnect the MSD, see if there is change. If not, disconnect the fuel pump, etc.



Once you isolate where the noise is coming from, now you can take steps to eliminate it. If is the fuel pump, make sure the fuel pump power wire isn't running with the RCAs, etc.