Please note:
        The product even had burn in over 300 hours before shipping.
        You can power on it with playing music if you are at home for quickly finished burn in. If you don't want listen music during the burn in term, you can turn the amp volume to minimum.
        The product had the pure class A analog amps and PSUs design, we are not recommend stack other products on its top directly, it need least 3CM room on its top side. Also we are not recommend stack it on the top of other hot products , it should place on the shelf .
        Please power off before connect or disconnect the inputs and outputs .
        Power on the product must had more than the half minute after last power off .
　

The front plate before Nov. 2019
        
The front plate since Nov. 2019
        

Important warn:
         Before push the "Setting" button, I are advice user turn  low  the amp volume, stop the music track playing .
         Because for the aim to reproduce the best sound quality, the DAC without mute design , change the setting may output circuit switch sound .
         Around 5 seconds after non any button had push, the display stop blink, user can click the music track to playing and  turn up the volume.

Setting button :
          Push the "Setting" button one time, the one digit display will blink for active the function setting , push the right "Selector" button can change function . While the display blink, push "Setting" again , the right next one digit display will blink , push the left "Selector" button the left next one digit display will blink .
         While the "Dis" LED blink, push the "Setting" one time , the menu will change to menu page 2.

Left Selector buttons:
           While the display non blink, for select the input sources.
          While the display blink, for the setting digit move one left.

Right Selector buttons:
           While the display non blink, for select the input sources.
          While the display blink, for setting the digital process functions.

The 1st display element  : (Was print Syn :Syn version for correct HDMI data, Asy version for Dith)
          Syn version : If the HDMI input had noise, distortion or some samplings no sound, user can setting the 1st number ON (1) or OFF (0) to fixed the issue. In default is OFF (0) .
         Asy version : Active (1) or Disable (0)  dither for all inputs.

The 2nd display element : (Was print Pll: Simulate SAA7220 +TDA1541A sound) :
           Active (1) : Simulate SAA7220 +TDA1541A, digital attenuation low to -55DB, was -130DB. Bitwide low to 16bit , was 24 bit. While active this function, I are advice setting to OS2 or OS4 mode. But infact, this function can working with any setting mode.

The 3rd display element :(Was print OS : Oversampling) :
         "O" for select oversampling, "N" for select NOS mode.

The 4th display element : (Was print Mode :OS and NOS modes):
          While OS setting on "O" mean the DAC working under oversampling mode, loIr number OS modes sound became warmer and smoother. Or depend on your sense .
         Mode "0" : class technology NOS mode.
         Mode "2" : 2X oversampling.
         Mode "4" : 4X oversampling .
         Mode "8" : 8X oversampling.

         While OS setting on "N" mean the DAC working under NOS mode, it has one mode now, it is the full new NOS configure design.

The 5th display element :  (Was print Di :Display) :
         Active (1)  the display auto dark, the display will become dark in around 10 seconds after stop operate any buttons . Disable (0) the display auto dark, the display  light always.

       
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    (Syn version still need the Mclk+ on this pin)           
Pin 11:      GND                         
Pin 12:      NC    (Syn version still need the Mclk- on this pin)   
Pin 13:      NC                            
Pin 14:      NC                           
Pin 15:      NC
Pin 16:      NC                            
Pin 17:      GND                         
Pin 18:      NC
Pin 19:      NC
R8_tda_Asy don't need MLCK input . Even the source has MLCK output but has not effect .
　

Firmware update introduce:
Since 8th. June 2020, the unit has the update port on rear for update the FPGA firmware and USB interface firmware without open the unit.


UPDATE PORT 10 pins port :
       To connect the Altera Blaster and proceed with an FPGA firmware update from Windows, using the Altera programming software. These updates are meant for upgrading the functionality and/or sound quality .
UPDATE PORT switch :
        For updating the built-in Amanero module's firmware through the USB input.
Amanero firmware download link：
        https://www.amanero.com/combo384_firmware.htm
Amanero firmware update guide :
        Please download the update tool and guide from Amanero's official web . In the official update guide, there is a step requiring that two pads be shorted more than 1 second on the Amanero module , while with the DI-Large, users only need to push the red button for more than 1 second in order to perform the same step . Other update steps are the exact same as in the official guide.