Wisdom in mind,   enthusiasm at heart.

NFB-3DAC
Dedicated Discrete DAC built in ES9018
DSD , DXD support from USB
32bit / 384K Sabre ES9018  
32bit / 384K Asynchronous Transfer  USB-32 Chip

The rule of the power ON /  OFF:
Power On :
     Source power ON ---->  NFB-3  power ON ----> Amp power ON ( preamp , headphone amp and integrated amp )
Power Off:
    Amp power OFF ( preamp , headphone amp and integrated amp ) ---> NFB-3  power OFF ---> Source power OFF .

Please note :
      Before shipping we had double check the gear have the perfect state of the outside . 
        Few countries customs workers is rude maybe scrape the chassis or volume knob while custom check , if the scrape have not effect the performance , customers can pay the shipping cost for ask we send the free parts for replacement .
        If the volume switch broken during rude custom check , there is a spare volume switch in the pack for customers replace by themselves , this is had not soldering necessary .
        In our experiences , scrape chassis or shatter the volume switch is very infrequent ( In case less than 1%).
        The product had include shipping insurance , if had any damage , can ask the express company make the compensation .

Setting button:
Shipping before 15th Dec. 2014: Select the NFB-3 output level at high (2.5V RCA) or low (1.25V RCA , 2.5V XLR) , ACSS output have not function.
Shipping since 16th Dec. 2014: Select the DSD mute control signal active . While play DSD files, push into .

Selector button:
Select the input modes of the NFB-3(2014) .    1 : USB input.     2 : Coaxial input.    3 : Optical input.

Please note : The BNC and RCA coaxial input can not connect source at same time .