I think there were questions as to whether one could use the ACSS from Dac-19 to NFB-1Amp and get balanced output. After a couple of emails with Kingwa, the end result is:
"You can get the single ended ACSS cable connect to the NFB1AMP, had the balance output."
The question specifiaclly regarded going from Dac-19 10th anniversary edition to NFB-1 Amp via ACSS to achieve balanced output. That pretty much clears it up, at least for me.