Note: The manufacturing process and design can be updated and upgraded at any time so internal and external changes to the actual product can occur without notification.

Please note:
         This product applies the latest power technology. Therefore the working temperature has dropped significantly compared to the previous generation products. This allows leaving power on over the long term.
        This product is burned-in for at least 100 hours before shipping.
        We recommend burning it for an additional 300 hours for best results.
        The quickest way to complete the burn-in of this product is to play music continuously. The amplifier can be turned off meanwhile, it will not affect the burn-in process.
        Please power off the unit before connecting or disconnecting inputs or outputs.
        Do not immediately power on the unit after powering it off. Wait for at least 30 seconds.
　

Working normal state：
Leftmost digit:
         Input channel indicator, either 1,2,3,4,5 or 6 ( for details, please read below ).
2nd digit:
         Input signal format ,  display P for PCM formats, display d for DSD formats . (Since 1st . Aug. , this digit become reserved for future use) .
The remaining digits:
         Input signal sampling rate indicator; 44.1, 48.0,88.2, 96.0, 176, 192, 352 and 384 are for the PCM formats, while 064, 128, 256 and 512 are for the DSD formats.



Button functions：
Setting button:
        Push the "Setting" button once, the leftmost digit will blink, which indicates it is selected. This allows changing the corresponding setting. Push the left "Selector" button to select the desired value. While the display is still blinking, push "Setting" again , the next digit to the right will be selected and blink. Push the right "Selector" button to select the digit to the left of the one currently selected.

Left "Selector" button:
         While the display is in normal state (not blinking), it allows selecting the input source in decreasing order. One of the following will be displayed:
"1 - AES", for the AES/EBU digital input;
"2 - BNC", for the BNC coaxial digital input;
"3 - RCA", for the RCA coaxial digital input;
"4 - OPT", for the optical digital input;
"5 - IIS", for the HDMI-IIS digital input;
"6 - USB", for the USB digital input.
         While the display blinks, the left "Selector" button allows moving the selection to the left.

Right Selector buttons:
         While the display is not blinking, it allows selecting the input source in increasing order.
While the display is blinking, it allows changing the value of the selected setting.

　

Setting values：
 
　

Important warning:
         Before changing the settings, the user is advised to lower the volume and to stop the playback.
         To guarantee the best possible sound quality, this DAC is without a muting function, therefore unwanted sounds can occur while settings are modified.
         After 5 seconds without pushing buttons, the display will stop blinking; the user can then resume music playback and raise the volume to the desired level.

Menu Page 1:

The leftmost digit: Oversampling select
         O (OS) : to select the oversampling mode.
        n (NOS) : to select the NOS mode.

The second digit from the left:  OS and NOS modes select
          While working under oversampling (OS) mode, the lower the oversampling level is, the warmer the sound will be. The possible values are:
        0 : basic NOS mode.
        2 : 2X oversampling
        4 : 4X oversampling
        8 : 8X oversampling
        While the OS setting is on "N", the DAC will be working under NOS mode. Although values from 1 to 3 can be selected, it will not change the sound. These values are there for future use, when a new firmware is eventually released, offering new NOS modes. This will avoid having to change the unit's MCU to obtain the new modes.

The 3rd digit:  Simulates the sound of a turnable
           S (Simulate) : Activate the phono simulation feature, and we recommend to set the DAC on OS2, OS0 or NOS mode for best results.
          n (Non-Simulate) : Disable the phono simulation.

The 4th digit:   reserved for future use

The 5th digit:   reserved for future use

Menu Page 2:
The leftmost digit: Display auto-dimming setting
        A (Auto) : Enables the display's auto-dimming; the display will dim 10 seconds after the buttons are left untouched, only keeping a LED bar lit to indicate the unit is turned on. As soon as a button is touched, the display will turn back on.
       n (Non auto): Disables the display's auto-dimming, the display will remain on at all time.

Setting examples:

1. Settings for most neutral sound (8x oversampling, not simulating a turntable):
         Push the "SETTING" button 2 times, the 2rd digit will blink, then push the right "Selector" button to set the value to "n".
         Then push the "SETTING" button one more time, the 2nd digit will blink, then push the right "Selector" button to set the value to "O" .
         Then push the "SETTING" button one more time, the 3rd digit will blink, then push the right "Selector" button to set the value to "8".
         

2. Settings for OS0 and phono simulation mode:
       Push the "SETTING" button 2 times, the 2nd digit will blink, then push the right "Selector" button to set the value to "S" .
       Then push the "SETTING" button one more time, the 3rd digit will blink, then push the the right "Selector" button to set the value to "O" .
       Then push the "SETTING" button once again, the 4th digit will blink, then push the right "Selector" button to set the value to "0" .
        

3. Settings for NOS mode with phono simulation (new option combination to get the warmest and smoothest sound ):
        Push the "SETTING" button 2 times, the 2nd digit will blink, then push the right "Selector" button to set the value to "S" .
       Then push the "SETTING" button one more time, the 3rd digit will blink, then push the right "Selector" button to set the value to "n" .

       
HDMI definitions :   (Apply HDMI transmit the IIS signal, the pin's definitions must exact same , and not promise compatible with other brands)

Note that this product does not require the source MCLK signal but if present, it will simply be discarded.
　

Firmware update now features:

         

10-pin UPDATE 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:
        Don't touch this switch when the product is powered on unless proceeding with an Amanero firmware update, underwise you will be forced to proceed with an actual update, as the firmware will have been erased.
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 , while with this product, the end-users only need to push the black button for more than 1 second in order to perform the same step.
         The other update steps are the exact same as in the official guide.

Please note:
Some few customer feedback they accidentally touch the Amanero update button cause the firmware delete, Since 23rd. July 2021 , the product ship without connect the update button wire, if customer want to active the update button feature, connect by self.