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I have a similar problem. buzzing sound for a few hours, and then the sub-woofer gives a very low sound, which you can barely hear. Any suggestions ?I have a similar problem. buzzing sound for a few hours, and then the sub-woofer gives a very low sound, which you can barely hear. Any suggestions ?
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After looking at your user manual I see a Bluetooth powered sub with a standard AC cord. This should work with other Bluetooth devices provided JBL hasn't done something proprietary with this system. See https://www.groupon.com/articles/how-does-bluetooth-work for a fairly good explanation of Bluetooth. Then, before buying anything, I would call JBL tech support and rule out the "proprietary" possibility (+44 161 222 3325).
Cheers!
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Sounds like it could be a short or loose wire going to the speakers. You can try taking the case off to look, but chances are you are going to need to take it to a professional to get it looked at.
If you turn the unit on with no input and get a loud buzz, and when you put signal to it and you cannot hear the music but the buzz (Probably more like a hum). Then most likely the amp is blown.
It is possible that the amplifier within the unit is faulty; The best you can do is to put the woofer ON for about 12 hours so that if there is any chance of any capacitors being faulty or has electrlytic drying.
if this wont solve the unit must be opened to check the amplifier. Possible failure of the input source selector as the woofer is humming.
More likely to be the Class D power amp module, but you should look through the service manual to make sure all the parts are installed correctly. My PB10 AMP module went out and you cannot get one anymore. http://manuals.harman.com/JBL/HOM/Service%20Manual/PB10%20sm.pdf
what kind of conections do you have on the back of the sub you should either have RCA connections or just one RCA connection or a place for speaker wire to plug directly into it. IF you have RCA connections in back i would use those they will connect directly to your system if your system had and a sub pre out on it read your manual and follow those instructions as well it will help
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