background noise

Hi guys, Am looking for help. I have a 6000A and since yesterday both my speakers started making a (slightly hissing) sound/noise. The louder the volume, the louder the noise. The sound is not overwhelming - I can still hear the music very well - but it is clearly annoying. The best attempt...

I've got the Issue that when i try to play audio via USB I'm getting a annoying noise that i can't seem to fully fix. From what i found out could it be caused by the USBs "Framerate", which is 1kHz, but how can i stop it? The only Idea i got is getting a powered USB-Hub, but i wanted to ask if...

I have bought DX3 PRO+ recently. Came home and connected the DAC to the power supply, inserted 35 Ohm IEMs and immediately noticed very audible noise even before I turned the device on, i.e. when it was in stand-by mode. The noise doesn't depend on volume level and is almost or completely gone...