Wisdom in mind,   enthusiasm at heart.

NFB-10.33
Discrete  DAC+ Headphone amplifier / Preamplifier

32bit / 384K Asynchronous Transfer  USB-32 Chip
Built in 2 Pieces Hi-end grade WM8741 Chips
Price:   USD580 (free the based remote )
Extra metal remote :  USD50        

USB-32 Introduce and drivers download

Fully balanced design built by discrete analog stages without any OPA and coupling caps in the signal channels.
Non- feedback ACSS analog output stage.
R-core transformers.
Total of 7-groups dedicated power circuits and more than 38,000UF caps are used to purify the power supply.
Four-channel digitally controlled relay-based volume control to avoid channel imbalance and improve sound quality.
80 steps volume level control in both high gain mode and low gain mode. 160-step volume control ensures smooth control of the volume level.
3 digital inputs:   Coaxial (BNC & RCA) /  Optical / USB    * BNC and RCA coaxial input- only one can be connected at a time.
DAC output:   XLR *2 / RCA *2 / ACSS  (User can set to either variable or fixed output level )
Headphone output: 4 pin XLR / 1/4" (6.3MM) SE
　

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  tin solder.)