Please note: The product improve cause the inside or outside change without inform .

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, 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  : (Reserved)

The 2nd display element : (Simulate SAA7220 +TDA1541A sound) :
           1 (TDA) : Active 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.
           0 (R-2R) : Disable simulate SAA7220 +TDA1541A .

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

The 4th display element : (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 : Display auto dark setting
         1 (Auto) : Active  the display auto dark, the display will become dark in around 10 seconds after stop operate any buttons ,only leave a little LED light for figure the unit power on. While user operate the buttons , the display light auto .
         0 (Non auto) :Disable the display auto dark, the display  light always.

Setting examples:

1，Set to most neutral sound mode (8x oversampling, non TDA mode):
           Push the "SETTING" button 1 times, the 1st. digital  blinking, then push the "SETTING" button 1 times, the 2nd. digital blinking ,push the "Right INPUT"  set it to "0"
           Push the "SETTING" button 1 times, the 3rd. digital blinking ,push the "Right INPUT"  set it to "0" .
           Push the "SETTING" button 1 times, the 4th. digital blinking ,push the "Right INPUT"  set it to "8" .
         
2，Set to TDA1541 Simulate mode:
           Push the "SETTING" button 1 times, the 1st. digital  blinking, then push the "SETTING" button 1 times, the 2nd. digital blinking ,push the "Right INPUT"  set it to "1"
           Push the "SETTING" button 1 times, the 3rd. digital blinking ,push the "Right INPUT"  set it to "0" .
           Push the "SETTING" button 1 times, the 4th. digital blinking ,push the "Right INPUT" set it to "0" or "2" or "4" (the number lower sound is more warmer and smoother).
        
3，Set to NOS mode (New configure NOS mode with simulate TDA mode for the one of the most warm and smooth sounding):
            Push the "SETTING" button 1 times, the 1st. digital  blinking, then push the "SETTING" button 1 times, the 2nd. digital blinking ,push the "Right INPUT"  set it to "1"
           Push the "SETTING" button 1 times, the 3rd. digital blinking ,push the "Right INPUT"  set it to "n" .

       
HDMI definitions : (Compatible with PS audio standard)

This product don't need the source MCLK signal but even the source has MLCK output but has not effect .
　

Firmware update introduce:

         

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 .
FPGA firmware download and update guide: http://www.audio-gd.com/Firmwaredownload.htm
UPDATE PORT switch :
        For updating the built-in Amanero module's firmware through the USB input.
        Please note: If no plan to update the Amanero firmware, don't touch this switch when the product is power on .
Amanero firmware download and update guide: https://www.amanero.com/combo384_firmware.htm
Amanero firmware update guide : http://www.audio-gd.com/Pro/dac/Amanero/AmaneroEN.htm
        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 , in this product, 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.