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NFB-28.38 (ES9038Pro)

 Discrete  DAC+ Headphone amplifier / Preamplifier
With XLR / RCA analog inputs
 built in Sabre ES9038Pro
 DSD , DXD 32bit / 384K Support From USB / HDMI
 9500mW at 40 ohm ( per channels )
 Built with OCC and Hi-end parts

      


      
Summarize Use Manual Specs Custom Option Shipping Cost

         The mini remote shipped without battery because the either DHL and EMS limit shipping by plane , customers want to buy one CR2025 battery and assemble in the remote.

        

Discontinued the analog idle input short circuit function:
          The unit  had design the analog idle input short circuit (In 5 and In 6) 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 5 and input 6 had connect two extra DACs,  while users select the either input 5 and input 6 , 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 5 and input 6, 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 input 6 and input 5  at simultaneity.
          

manual:

Gain button:
Select the Fast / Slow volume control characteristics.
        H: Fast.  64 steps range.  
        L: Slow. 100 steps range.
        F: (Full ) High gain mode. 100 steps range. (For the low sensitivity headphone like the HE-6 or the source had low output voltage level)
        S: (Super)High gain mode. 64 steps range. (For the low sensitivity headphone like the HE-6 or the source had low output voltage level)

The button on rear : Pull out for the DAC / preamp without volume control , Push into for the DAC / Preamp with volume control. The headphone output always had the volume control. Please operate the button while the unit power off .

The display auto dark :  Push into the jumper is auto dark .Please operate the jumper while the unit power off .


DSD / PCM support from I2S input :
 The DSD/PCM support not only from the USB input, but the I2S input.   The NFB-28 can detect the I2S input signal, if input DSD signal, it will auto to remove the DSD pop noise while select the DSD track .


HDMI definitions : (Compatible with PS audio standard)
Pin 1 :       SDATA -                     
Pin 2 :       GND                         
Pin 3 :       SDATA +                    
Pin 4 :       SCLK +                       
Pin 5 :       GND                         
Pin 6 :       SCLK -
Pin 7 :       LRCK -                        
Pin 8 :       GND                         
Pin 9 :       LRCK +
Pin 10:      NC                     
Pin 11:      GND                         
Pin 12:      NC
Pin 13:      NC                            
Pin 14:      NC                           
Pin 15:      NC
Pin 16:      NC                            
Pin 17:      GND                         
Pin 18:      NC
Pin 19:      NC


I2S-RJ45 input format:
( 3.3V level ,  we can't guarantee the I2S input can cooperate with all I2S output devices.
( The I2S transmit want to take care the transmit cable  )
Pin 1 : SDATA
Pin 3 : LRCK
Pin 5 : SCLK
Pin 7 : NC
Pin 2,4,6,8 GND



Digital filter setting¡G
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IIR0 ÉOIIR1¡GFor DSD.
¡@ IIR0 IIR1
47K Push Into Push Into
50K Pull Off Pull Off
60K Pull Off Push Into
70K Push Into Pull Off
FIR0¡AFIR1¡AFIR2¡G For PCM.
¡@  FIR_0  FIR_1 FIR_2
Fast roll-off,  Linear: Push Into Push Into  Push Into
Slow roll-off, Linear: Push Into Push Into Pull Off
Fast roll-off, Minimum: Push Into Pull Off Push Into
Slow roll-off, Minimum: Push Into Pull Off Pull Off
Fast roll-off, Apodizing: Pull Off Push Into Push Into
Fast roll-off, Hybrid: Pull Off Pull Off Push Into
Brickwall filter: Pull Off Pull Off Pull Off


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