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NFB-12.1

Discrete  DAC+ Headphone amplifier / Preamplifier
Built in 2 Pieces Hi-end grade WM8741 Chips

NFB-12.1 Price:  USD215

 How to set the NFB-12 DAC output as variable line level only?
    The NFB-12 has one group Line out for dedicated DAC output, In default its output level setting is at variable model . But owners can set it to can select between variable and fixed or output variable line level only . See the photos, change the jumper to "variable" side to set the DAC output to variable only.

         

 The NFB-12(12.1) Functions:

     Front plate:
     Output switch: Select output between headphone, Fixed DAC output and Variable DAC output.
     Gain switch: Select gain between low gain (+0DB) and high gain (+12DB).
     Volume knob: Control the volume level of the headphone and variable DAC output.
     Selector switch: Select source between USB, coaxial and optical.

     Rear:
     Power socket: For power input and power ON/OFF switch.
     USB socket: For USB input.
     Opt socket: For optical input.
     Coax socket: For coaxial input.
     DAC out sockets: For dedicated DAC output. (The DAC output level can be chosen between variable and fixed, see below).

9 types digital filter users setting.

For NFB-12 only, NFB-12.1 setting on the front plate.

                  

Please note:
     Please shut down the NFB-12 and pull off the power cable then make the setting change.(NFB-12.1 can select the setting directly)
     In 4X oversampling setting ,while select SPDIF input but without input signal, maybe output some noise.
     If the input sampling higher than the NFB-12(12.1) setting sampling, maybe cause some noise output.

8X oversampling , Minimum phase apodising filter.
Up to 48KHz support.  

8X oversampling , Linear phase apodising filter.
Up to 48KHz support.  

8X oversampling , Linear phase half-band filter for backward compatibility.
Up to 48KHz support.

 4X oversampling , Minimum phase 'soft-knee' filter.
Up to 96KHz support.

4X oversampling , Linear phase 'soft-knee' filter.
Up to 96KHz support.  

4X oversampling , Linear phase 'brickwall' filter.
Up to 96KHz support. 

2X oversampling , Minimum phase 'soft-knee' filter.
Up to 192KHz support. 

2X oversampling , Linear phase 'soft-knee' filter.
Up to 192KHz support.

2X oversampling , Linear phase 'brickwall' filter.
Up to 192KHz support.