Should work just fine. You'll just be bypassing the built in AMP for the NFB 1's AMP. My R2R 11 arrives in a couple of days, but later this year I'd like to get either the R2R 1 (balanced DAC) or R2R 2 (single ended DAC) and either a NFB-1 (balanced AMP) or a C 2 (single ended AMP). Mainly due to curiosity. I want to see if there is a discernible difference and worthy of the price difference.