I have an Azur 851N as well, but also have the Schiit Loki. The addition of the Loki is all positive (no downside at all). I also, just recently, added the Synergistic Research MiG's under the 851N, and am blown away at the improvement they made, so much so that I feel I now have an upgraded DAC, and no longer certain I need to upgrade it. FWIW - you might want to consider these two additions before replacing the 851N's DAC.
DAC Question: Delta-Sigma vs R2R
I have a general question, I am looking to buy my first standalone DAC, right now I have an Azur 851N, which is a streamer/DAC. As I look I continue to see discussions on Delta-Sigma vs R2R DACs.
I am in no way an audio expert nor do I have a good understanding of electronics.
In Laymen terms, Could anybody explain what is the difference between the 2 technologies?