Firmware 7.1.3 vs 8.1.3 vs 10.0.2

[Pjotr27]

It seems more dynamic, but also strangely louder than 9.0.1. 

7.1.3 is louder than other firmwares. I think that 7.1.3 is also more analogue sounding that the rest of firmwares. Warmer, nicer, more mids and more relax in sound.

I will agree with that. In my system (Musical Affairs Grand Crescendo, with PHY-HP units) 7.1.3 gives the most analogue sound of all firmwares. But Air 3.0 has a lot more issues and dropouts. So i move to USB connection. And that makes me happy. Lovely sound!