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Super Moderator
MY08 cabrio MY09 Brabus MY21 Bolt
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8,119 Posts
... really any time I put a load on the electrical system at idle. I'm beginning to think it might be a low voltage situation. Perhaps the voltage at the sub amp is low due to a bad positive or ground?
What MY smart, age of your 12V?
 

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Super Moderator
MY08 cabrio MY09 Brabus MY21 Bolt
Joined
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8,119 Posts
I was shocked to find that a battery (AGM) change may have fixed my growling sub!

A couple weeks later, all is good…

 
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