Topic: MADIface XT analog outputs crackle

my MADIface XT starts to produce crackling noises on the analog outputs (XLR) after a few hours of running. Sometimes a restart helps, but often not.
The headphone output stays fine.
Does anyone know this problem? Could a firmware update help or do you think it is a hardware problem?
I'd be glad if I don't have to send it to the German support, because they charge 500 € for a repair (!!!) which is really hilarious...

Re: MADIface XT analog outputs crackle

Zero information about current system, drivers and firmware ...

X10SRi-F, Win7 Prof, Cubase 9.5, UFX+, Octamic XTC, ADI-2 Pro FS BE/DAC, RayDAT, ARC USB