“Why is it making this noise? 2014 Honda Accord 3.5, when you turn on the car, the subwoofer makes a very loud thumping noise and it shuts off in about 1 minute or you turn off the radio and then restart it, it sounds fine after that. Stock radio”

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• It’s your auto noise canceling it plays white noise threw your speakers to cover outside noise. Threw your amp you making the noise amplified

  Answered by Wildwest 6 years ago

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• You are getting feedback in the wire somewhere maybe try different wiring package and definitely upgrade the radio

  Answered by Audiomonk 6 years ago

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