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Subwoofer problem when i turn on my jamo 503 sw for 5 mins it will start making a loud humming nosie ,when i turn it off and on it will work fine then the sub will make the loud hamming sound again

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Sound like a component inside the sub is overheating. Most likely will need to be replaced.
Thanks,
Lee

Posted on Jun 18, 2008

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I would check the caps on the power supply. They are rather large electrolytic capacitors that will look like they burst and/or leaking. When these die, the caps ground and the sub will make a loud buzzing sound. If you are handy with a soldering iron you can replace them yourself. Replace them with the same voltage or a little bigger and same with the size.

If the cap. says 16v 4700pF on it, for example, a 20v 5300pF or a 16v 6200mF cap. will work for this application.

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1 Answer

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How to Stop a Subwoofer Hum - HowStuffWorks

electronics.howstuffworks.com/how-to-stop-subwoofer-hum.htm
Would you like to learn how to stop your subwoofer from making a consistent low-frequent hum or buzz? Read this article to learn how to stop a subwoofer hum.

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1 Answer

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1 Answer

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Hi, this will happen when the motor become unstable. unfortunately, it isn't a failed component and, the motor will continue to operate in this situation with no defects. its just poor ,manufacturing within the motor design. you can purchase another motor and it will kill the hum.

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Yes, this sounds like the motor cutting out on thermal lockout.

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Dual Voice-Coil
The unique Dual Voice-Coil design allows both left and right channel sound from just one speaker. Simply hook up both the left and the right channels to the special terminals on the speaker. Hook up one channel only, if the speaker is to be used in a conventional stereo set-up.
I found this on jamo site hope that will help you

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