Hello, I have decided to change the DAC to test what people say that the Fiio k7 sounds better than the sound blasterX G6. And what I have found is that the difference in price and functions do not justify the price. The g6 sounds in detail the same as the fiio k7. At the soundstage level, I find the g6 wider (direct mode on soundblaster). The two DACs are equalized through Equalizer APO with the oratory1990 curve. Also, I have them connected to the PC so, when I turn off the PC, I have to turn off the fiio as well. I also watch movies on my OLED 42 C2 and listen to them through the SPDIF input of each card. I see that sound blaster has many more practical functions such as automatic shutdown, being able to decode through SPDIF DOLBY, and being able to listen to both SPDIF and the PC at the same time. I don't know if I have something configured wrong or something but I prefer the sound blasterx g6.
In addition, I have the fiio k7 connected by balanced cable to the balanced output.
Sorry for my bad english ;(