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HS 500 noise from subwoofer

When processor of my new HS500 warms up (after full DVD play cca. 2h) from subwoofer there is a noise (not loud but during the very silent part of movie you can hear it). Other speakers sounds OK. Noise is present also when mute is on. Level is changing with volume control on subwoofer. Frequency can vary when I open or close the door of DVD. I received new central unit and new subwoofer, but sound remains. I have unplugged all satellite speakers and TV but nothing change I tried to ground the system but no changes. When I switch the system off and it cools down, then noise disappears. And after 1,5 to 2 hours it appears again. Any idea?

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  • tinitis Mar 14, 2008

    Unforunatly, I am using same phase and to be sure that this is not a problem I have tryed using UPS - but no difference. And this is happening only after more than one hour that DVD is playing. I also try to ground booth devices, but nothing...


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Well as I see from the owner manual for this device the sub is active one and my opinion is that electric is your problem.The power of the sub and main unit must be on the same phase otherwise you'll hear brrrrr or frequency of your main unit power supply on the sub.Thats why sound changes when you open or close the door.Take one power distribution cord (get power for bought devices from the same place) and connect main unit and the sub on it and then try.I hope that this will help you

Posted on Mar 10, 2008

  • sanjin becirbegovic
    sanjin becirbegovic Mar 14, 2008

    I simply belive that two units brand (if I understand correctly) units has same mistake but if the device is still under warranty go to the authorised service (not dealer) and ask them for the opinion.It maybe that this is a factory fault and they know the solution.But if not you have already replaced whole system except maybe cables(RCA-RCA for sub and speaker for satellites) so why don't you take the whole thing (I know its messy) to some friend and test it for a while.If it works it means that you have some electric problems in your home but if same thing happens at your friend's place then the device has malfunction


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