• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Headphone Tube Amp buzzing and Humming how to fix?

Hello

I hear Buzzing and Humming from my WA 2 HPA when my desktop dac Burson Conductor C3(2V Line Out) is connected, can anyone tell me where this noise coming from and how do I eliminate it?

also I emailed Burson Audio and Woo Audio, and B told me on that it might be impedance matching issue.

And WA Told me that it's normal to hear Hum/Buz at High Volume.(which doesn't makes sense)

Please advise what i can do to fix it