It’s a loud noise. Similar to the “This is a test of the emergency broadcasting system” sound that plays (or use to play) through the television years back. The noise is not dependent on the engine running. The engine itself can be off and the noise and its levels are the same. I also turned the stereo volume level down to zero on the stereo however the amp still plays ringing whine noise through the subs.
It’s a loud noise. Similar to the “This is a test of the emergency broadcasting system” sound that plays (or use to play) through the television years back. The noise is not dependent on the engine running. The engine itself can be off and the noise and its levels are the same. Volume level of the stereo is set to zero however the ringing whine still plays through the speakers. I have noticed that it only starts after listening to music for about 10 minutes at moderate volume levels. Once the amp cools down, it plays normal for about another 5 to 10 minutes then its statrs back again.
That appears to be fixative that has been overheated. The resistor normally runs hot and can cause the fixative to change color. If you're concerned about it, you can pull the fixative off of the resistor and apply a different type of fixative.
If that's not it, it could be due to an intermittent connection (short or open). When it begin to make the noise, push on various components and various points on the board to see if you can change the tone. Use a non-conductive probe (wood, fiberglass...).
If that's not it, it could be due to an intermittent connection (short or open). When it begin to make the noise, push on various components and various points on the board to see if you can change the tone. Use a non-conductive probe (wood, fiberglass...).
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