I have a sproggy DC-DC power supply and it is grounded to the car's chassis in the trunk in my homemade wooden case. When I turn my windows software volume up to max, and turn up my stereo to max, I can hear a sound coming from my speakers which sounds like someone blowing bubbles in water. Kinda like a "glug glug glug glug glug" sound. When I turn the engine off, it continues for about 10 more seconds and then quits. Any idea what this might be? I really don't think I should have noise on my system when I'm using a DC-DC power supply which is grounded to the car's chassis. Additionally when the car is running, I have lots of alternator whine at the highest volumes as well.
No announcement yet.
Funny noise coming out of speakers...