Thanks for explanation, but let me elaborate a bit:
3. There is no OPA in default configuration, but still a option to couple it with standalone OPA modules: "NFB-5 can bypass the OPA for best neutral sound or replace the OPA for different sound flavors."
4. I meant nfb-5.32, unlike the Reference-5.32, its based on WM8741 pair similarly with nfb-15.1.
Edited by orth0dox - 9/14/12 at 12:15pm