Here's the subwoofer. All the help figuring this out is appreciated. I have No idea what I'm doing. I just know that electrons go in and thump-thumps come out.
The issue: the sub emits a low groan, a constant deep HMMMMMMMMMMMMMMMMM after being powered on for about 10 minutes.
I tested it after letting it cool down, and unplugging ALL audio sources. Just the wall power coming in. Same problem
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Model #:
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removed the back:
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Suspicious part #1. If he were sitting in a bar, the ladies would be covering their drinks...
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Suspicious part #2: More covered drinks. I don't like the looks of that brownish connector in the upper right, but he could be a nice guy.
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When it comes to electrics, I have no idea what the other settings on a multimeter do. I just check voltage with it to make sure my outlets are off at the breaker panel before I take cover plates loff.