I had a Node 2 for 2 years and found it had adequate sound. I had seen reviews of the Node 2i and the comments were that it was significantly better mostly from a updated layout of the circuit board NAD learned from the Masters series with no major changes in the parts from the Node 2. I bought one a 2i and at first noticed a small improvement. After a several days break in, it opened up and was significantly better. For $549 I think it's great for the money.
Terrific review of the Node 2i in Sept 2020 issue of the Absolute Sound.
Terrific review of the Node 2i in Sept 2020 issue of the Absolute Sound.