Wisdom in mind,   enthusiasm at heart.

NFB-28 (Version 2016 )
(The best mid range DAC +amp we ever had)
Discrete  DAC+ Headphone amplifier / Preamplifier
With XLR / RCA analog inputs
DSD , DXD support from USB & I2S Input
32bit / 384K Sabre ES9018
32bit / 384K Asynchronous Transfer XMOS U8 Chip

1,  Upgrade to the Amanero combo384 USB module:
     Upgrade to the Amanero combo384 USB module for replace the Xmos U8, price +USD45.

2, Upgrade TCXO for ES9018 for slight improve on the sound transparency .
     Cost is USD20/per,  without shipping delay .

3, 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   .

4, Custom order HDMI replace RJ45 I2S input.
     Price is USD20, without shipping delay.

5, Custom order HDMI replace USB input.
     Free with 1 days  shipping delay.