@Amarok and the rest of the community, Now that I have replaced my first OpAmp I'm really getting curious about different options :) I guess that's how a lot of you feel as well. I'm thinking about 3 potential options and I would be really interested in your opinion/experience: 2x 8920 I/V &...

It does. I have it installed on my Windows 10 64bit system.

Thanks a lot for that hint. I've just received my new MUSES01 OpAmp and placed it in the buffer of my STX ii. I left the 2 8920 in the I/V. First impression is that the sound is wider, more calm and clearer. I also have the feeling that I hear more hiss out of the speakers. Is that normal or...