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RSB-14 - Humming (static) noise after 1 minute


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Just picked up a RSB-14 and 2 minutes after powering up the sound bar, I hear a constant hum or static sound. Very noticeable when I mute it.  I have reset it, tried every input. Changed HDMI cable. Tried a different wall power outlet. Makes no difference. 


I assume this is not normal and wondering if anyone else has experienced this.   I have attached a sound file (.m4a) if interested in hearing it.


Any suggestions, besides returning it? Thanks in advance.

Klipsch RSB-14 humming (22JUN18).m4a

Edited by mrbugs
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