I have a very strange issue on hand with a 2015 Razer Blade. Any audio device connected to my headphone amplifier has horrible interference when the power is plugged in. Onboard sound and a dragonfly dac both have the same issue, which goes away as soon as the power brick is unplugged. If I connect headphones directly to the audio jack on the laptop or dac, no interference at all. I guess I'm going to have to exchange the laptop, because this problem makes no sense. I don't know if I should...
Hissing and popping audio
Hissing and popping audio