What are the advantages of the dual Wolfson chips in the NFB2/3 vs. the single Wolfson chip in my Pico Dac?
Is the extra $150 worth it for the NFB2? Has anyone done a side by side comparison of both units?
I've read the posting in the FAQ section of the Audio GD website which addresses the question of the differences between both units, however, I'm not going to pretend to understand it.
I understand the NFB2 has a better power supply, which I'm sure will make an audible difference. If it makes $150 audible difference is subjective, of course.
Uncle Erik? We could use your expertise in deciphering what Audio GD means when they say:
"1, What's different between NFB-2 and NFB-3?
The NFB-3 also applies mostly high-end parts, like DALE and Vishay resistors, NOVER capacitors, etc. The main differences are as follow:
1, The NFB-3 applies 2 groups of class A parallel connection PSU supplied for analog output stage, (the analog output stage power supply is very important, so we keep the 2 groups of class A parallel connection PSU here). Another 5 groups of linear PSU's supplied for other parts. The NFB-2 applies 6 groups class A parallel connection PSU for the whole gear, and one linear PSU for the control parts.
2, The NFB-3 applies a toroidal transformer, the NFB-2 applies an R-core transformer.
3, The NFB-3 applies mostly EVOX caps, the NFB-2 applies mostly WIMA caps. On other parts, NFB-2 are about the same with the NFB-3."
Why does it matter if my PSU has an "EVOX" cap vs. a "WIMA" cap? Quality and longevity? Toroidal transformer vs. R-Core? 6 groups vs 5 groups parallel connection PSU? Can someone please educate me so that I can make an informed decision? 
