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 .
       

Function introduce :
         The DAC can setting the digital process functions on front plate to change the sound flavors, without open the unit .

        

Important warn:
         Before push the "Setting" button, we 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.

Menu Page 1:

OS (Oversampling) :
         "O" for select oversampling, "N" for select NOS mode.

Mode ( OS and NOS modes):
          While OS setting on "O" mean the DAC working under oversampling mode, lower 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, different modes offer different sound features, usually mode 3 is most users favorite. Or depend on your sense .
         Mode 1 : Simplest data process .
         Mode 2 : Data fifo.
         Mode 3 : Fastest data process.

Dith  (Dither) :
           Active (1) or Disable (0)  dither for all inputs.

Pll  (PLL) :
           Active (1) or Disable (0)  PLL for USB and HDMI inputs, we are advice setting Active (1) for the low performance source but Disable (0) for the high performance source, or depend on yourself sense .

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.

Menu Page 2:

1st number  (synchronizer for HDMI) :
          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) .

2nd number  (synchronizer for USB) :
          If user want to replace other brands USB module in the unit, user can setting the 2nd number ON (1) or OFF (0) to find the best match .In default is OFF (0) .