NFB-27.77   
(Dual ES9038Pro + FPGA Processor)

Discrete  DAC + Headphone amplifier / Preamplifier
Built in FPGA processor , reject the jitter
DSD , DXD support from USB &I2S
Dual 32bit / 768K Sabre ES9038Pro
32bit / 384K Asynchronous Transfer Amanero Combo 384
Built in OCC and TCXO ,no upgrade options
9000mW at 40 ohm (Class A, per channels )

The unit applied analog input short design :
          The unit  had design the analog idle input short circuit (  In 7 to In 9) 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 7 and input 8 had connect two extra DACs,  while users select the either input 7 and input 8 , 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 7 and input 8, the another input signal will short circuit then no any signal fire through circuits , can keep the sound quality had not degrade.
          If you don't want the input short functions, please custom order.
　

Functions :
HP/PRE : For select the unit output from headphone sockets or the XLR / RCA sockets.

Selector : For select the unit input channels.
1: RCA input.
2: BNC input. 
3: RCA input.
4：Optical input.
5：I2S input.
6,  USB input.
7,  Analog XLR input.
8,  Analog RCA input.
9,  Analog RCA input.

Volume: For change the volume of the unit.
DAC/PRE button: For select the unit as DAC output With volume control or Fixed level , without volume control output from the XLR / RCA sockets on rear .

The display auto dark :  Push into the jumper is auto dark .Please operate the button 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 DACcan detect the I2S input signal, if input DSD signal, it will auto to remove the DSD pop noise while select the DSD track .