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    Review and Measurements of xDuoo TA-10 Tube DAC & HP Amp

    Do you have a wifi router close to the amp? It could be wifi interference. I also had very audible background noise with my TA-10R. I tried various methods (changing tubes, using different headphones, adding an UPS, etc) to fix it, but to no avail. Finally I was able to get rid of the noise by...
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