Wisdom in mind,   enthusiasm at heart.

NFB-27(Version 2014 )(DSD / DXD )(Since 1st May 2014)
Fully Discrete  DAC+ Head amp / Preamplifier

DSD , DXD support from USB
32bit / 384K Sabre ES9018
32bit / 384K Asynchronous Transfer  USB-32 Chip
5 groups digital & 3 groups analogy inputs
OCC wires and TCXOs built in

Price:      (Exclude shipping cost)
               USD 1530 (With Metal remote)

Click to read    FAQ
USB-32 Introduce and drivers download
Audio-gd products had design and test based on the AP SYS-2722 (The top-drawer professional equipment in world)

　

Summarize
Fully balanced design built by discrete analog stages without any OPA and couple caps in the signal channels.
Non- feedback ACSS analog output stage .
Uses three R-core transformers (135W total) separate power supplys for the digital part , right channel and left channel.
More than 50,000uf audio grade NOVER capacitors are used to ensure ample and smooth power feed.
A total of 11 class A PSU groups are used to purify the power supply. To achieve high S/N, the control circuit is powered with separate regulator.
Uses most Hi-end grade parts and exact match transistors.
Four-channel digitally controlled relay-based volume control to avoid channel imbalance and improve sound quality. NFB-27 has 99 steps volume level control in both high gain mode and low gain mode.
5 groups digital input :   BNC / BNC+RCA coaxial / RCA coaxial / Optical / USB
3 groups analog preamp input :  XLR / RCA / RCA
Preamp / DAC output :   XLR / RCA / ACSS (variable)
Headphone output : 4 pins XLR / 6.3MM SE
Memorizes all settings and resumes the last setting when powered on (see user manual).
　

Modification guide on headphone jack for 4-pin balanced headphone output.
   Click here to read:   modification guide
Parts for the modification is USD30. (Includes one female 4-pin plug and one male 4-pin plug, some tapes and some WBT tin solder.)