Other Probable Causes Of Noise - Emotiva UMC-1 Operation Manual

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OTHER PROBABLE CAUSES OF NOISE

Speaker noise may also be caused by interference or noise on your AC line. Make sure there are no large
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appliances sharing the line, or halogen lamps or light-dimming Triac devices.
Try connecting your system to another AC socket on a separate line.
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If the hum is heard from within the UMC-1 and not through the speakers, this may also be caused by
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interference on the AC or DC lines. The power transformers may turn this interference into an audible noise.
Internal hum can be made worse by a shelf or cabinet resonating, so try moving the UMC-1 to another shelf.
Try moving your components further away from the TV, especially if you ever notice the screen has changed
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color in the area closest to the component.
If you have very high efficiency speakers, these may tend to reveal noises which other speakers do not.
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