I woke up one morning to a loud humming sound coming from my subwoofer speaker. Now, when ever I turn the subwoofer on, it continues to hum loudly. Is this repairable? If so, can I repair it myself, or do I need to send it to the manufacturer?
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The hum (50 or 60 Hz) is caused by the AC power getting into the entry point of the amplifier. Either the filtering capacitors from the powersource of the speakers have dried up - replace them - or there is a short in the cables. There is another possibility: if you have kicked the subwoofer box its transformer might have slipped from its fixings and now is touching the subwoofer speaker frame.
The only way to find which is to open the cases.
go to control panel
sound and audio devices
under voice recording clk volume and mute the mic phone...........
some how your mic is conflicting with speakers. Keep your mic away from your speakers..
Since this set is hardwired together and the other speakers are working, the only easy fix would be the subwoofer got turned down on the remote volume control. Anything more would mean its broken. If its under warranty take it back. If its not and you know somebody capable, you might have them check for the obvious,bad solder connections on speaker, or and open voice coil on the speaker it self.
I had the same problem for many months. I asked a sound & video professional and he suggested I move the subwoofer away from any power source. I had the subwoofer next to my UPS. Once separated and moved all wiring away from the power supply (about 12") the low bass hum was practically gone.
Check you sound properties. The computer may not have configured the speakers properly. Make sure the speakers are listed and that the correct drivers are installed. Doublecheck that you have the plugs in the proper jacks. Hope this helps.
The humming sound usually comes from the DC supply that is not filtered. The a/c converted or changed to DC needs to be "cleaned", before going into the ckt. Usually the capacitor and resistor network go bad, maybe causing the fuse to open. Even if you replace it, u may still have the "humming" because the circuit is still bad. If you know how to look at the capacitor, resistor,or coils AFTER the diodes & replace the damaged part, u should be good!
This can be caused due to an increase in local interference. The hum is decreased when you plug in the satellites because the interference is spread over a longer area.
You may notice that speakers tend to hum around things like cell phones and power outlets. To see if this is the case, move the speakers to another part of the room if you can, slide the desk around, plug the computer in at another room, something like this. If the hum gets louder or quieter, it is interference at your new place. This can be solved by finding a new area to set up your computer stuff at. Since it's mostly the subwoofer, try elevating it off the ground, there may be a power main running under the floor.