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Discrete  Headphone amplifier / Preamplifier
Output 3500MW at 25 ohm
Class A power supply
ALPS 27 volume port built in
OCC and hi-end parts applied




Use Manual


Custom Option

Shipping Cost

Font plate functions introduce:

HP/PRE button :
          Select the NFB-3AMP output model 

Gain button :  
          Select the gain of the NFB-3AMP

Input button :
          Select the NFB-3AMP inputs from IN 1 to IN 3.

Volume knob:
          Select the NFB-3AMP volume control .


Two sets Exponential Volume Characteristic

Discontinued the analog idle input short circuit function:
         The unit  had design the analog idle input short circuit for avoid the disturb between different sources.
         This design also applied in a lot high end
brand devices.
         The working theory : 
Without the idle input short circuit ,if the input 1 and input 3 had connect two extra DACs,  while users select the either input 1 and input 3 , the another input signal will fire through the circuits and mix  into the using signal, even though this signal is  weak  but still can degrade on the sound quality.
          With the idle input short circuit function : if user select either the input 1 and input 3, the another input signal will short circuit then no any signal fire through circuits , can keep the sound quality had not degrade.
       Below case users want to discontinued the idle input short circuit function, pull off the 4 jumpers as mark on the photo:
      1, The same extra source not only connect the
unit analog input, but connect with other amps simultaneity.
      2, The same extra source connect to the
unit different inputs  at simultaneity.


Setting the NFB-3AMP have warmer sound:
        The settings  for setting the NFB-3AMP have warmer sound. Push into 2 pcs jumpers let they active .
        The setting can effect the sound become warmer for all inputs .
(Please pull out the power cord before the cover of the chassis is taken off .)



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