Wisdom in mind,   enthusiasm at heart.

NFB-28 (Version 2014 )(DSD / DXD )(Since 1st May 2014)
Discrete  DAC+ Headphone amplifier / Preamplifier
With XLR / RCA analog inputs
DSD , DXD support from USB
32bit / 384K Sabre ES9018
32bit / 384K Asynchronous Transfer  USB-32 Chip

1, Custom order two pair RCA outputs:
       The NFB-28 default have one pair RCA and one pair ACSS output , If customers don't want ACSS output , free for replace by RCA output without shipping delay   .

2, Upgrade TCXO for USB-32 and ES9018 for slight improve on the sound transparency .
     There two TCXOs can be upgrade  for the USB-32 and ES9018, cost is USD20/per,  without shipping delay .