Question about JBL Venue SUB10 Subwoofer
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Posted on Jan 02, 2017
SOURCE: Subwoofer hum
Based on your description, the internal power supply of the subwoofer amplifier would be suspect. Often it would be a blistered or leaking filter capacitor. It is a relatively easy/inexpensive repair.
Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information. Good luck and kind regards. Thank you for using FixYa.
Posted on Nov 10, 2008
In the industry - It is called "Turn-On Thump".
There are some manufacturers that eliminate components like noise filters on enry level lines to save money.
There is no way to lessen this noise without ripping the amplifier apart and having a technical knowledge of the way amplifiers work. It would involve hard-wiring a slow charge capacitor in the turn on line so it gradually builds power instead of getting it all at once.
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Posted on Feb 10, 2009
Have you tried turning the gain down before turning it on. If that works, it might be the internal amp picking up noise somewhere. Maybe even a bad ground. Either way there are only a few things you can try before complaining to the manufacturer or replacing it. Changing its location might help and if it does might indicate RF interference. You can also try running it through a power strip, one equipped with a filter (these are fairly common). Good luck
Posted on Mar 29, 2009
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