Wisdom in mind,   enthusiasm at heart.

NFB-27H  (2015)(Release at 1st Aug)

Discrete  DAC + Headphone amplifier / Preamplifier
Combine from the NFB-7 + 9

DSD , DXD support from USB & I2S
32bit / 384K Sabre ES9018
32bit / 384K /DSD  Amanero combo384
OCC and TCXO applied ,no upgrade options
9000mW at 40 ohm (Class A )
16000mW at 25 ohm (Max)

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.

Functions :
HP/PRE : For select the unit output from headphone sockets or the XLR / RCA sockets.
Selector : For select the unit input channels.  (The input 4 had both BNC and RCA sockets, but at the same time only can connect either )
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 jumper while the unit power off .



Digital filter setting：
SET ： Push into the jumper is NOS, pull off is Oversampling . Available of PCM signal input from USB or I2S .Please operate while the unit power off .
IIR0 与IIR1：Available for DSD input .
                 IIR0                       IIR1
50K         Pull off                    Pull off
60K         Pull off                    Push into
70K         Push into                 Pull off

FIR ： Push into for setting Slow roll off , pull off for setting Fast roll off . Please operate  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-27 can detect the I2S input signal, if input DSD signal, it will auto to remove the DSD pop noise while select the DSD track . (Had test working well with Amanero and Xmos U8 ) .