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

1, SPDIF interface module :
     The default SPDIF interface is WM8805 module, it can free to replace by the DIR9001 module while place the order . Customer can buy the extra DIR9001 module cost USD22.5 .
     What different between the DIR9001 and WM8805 modules : The WM8805 sound slight warmer , support up to 192KHz . the DIR9001 sound quite neutral, support up to 96KHz .

2, Upgrade TCXO for USB-32 chip .
     There is a TCXO can  upgrade  for the USB-32, cost is USD20  without shipping delay .