R-8HE (2021 Version)


(Regenerative power supply)
　

8 group fully discrete R-2R DA modules to combine into real balanced push/pull decoders.

4 group fully discrete real balanced DSD native decoders.

Fully discrete real balanced  current transmition design.

2 pc ultra high frequency 90/98 MHz Accusilicon 318B femtosecond clocks provide synchronous clock for whole unit without PLL up-frequency .

32bit / PCM384K /DSD512 asynchronous transfer Amanero 384 apply the FPGA synchronous clock.

Both USB / HDMI have built in separate isolator and isolate power supply.

The whole digital circuit built with 1 pc FPGA and 5 pc CPLD programmable chipsets to separate the different configured circuits for avoid interrupt, data process in parallel mode.

Support firmware update to improve on sound quality.

All digital process mode settings accessible by buttons on front  (No need  to open the chassis).

Firmware update port accessible on rear (Update  firmware no need  to open the chassis).

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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 .

Left Selector buttons:
           While the display not blink, for select the input sources.
           While the display blink, for the setting digit move to one left digital.

Right Selector buttons:
           While the display not blink, for select the input sources.
           While the display blink, for set the digital process functions.

Menu functions:

Syn  (non function in the default installed Asy version firmware) :
           For the Syn version if the HDMI input had noise, distortion or some samplings no sound, user can setting the 1st number digital ON (1) or OFF (0) to fixed the issue. In default is OFF (0) .

Pll  (Simulate SAA7220 +TDA1541A sound) :
           Active (1) : Simulate SAA7220 +TDA1541A.While active this function, I are advice setting to OS2 or OS4 mode. But in fact, this function can working with any setting mode.

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, it has one mode now, it is the full new NOS configure design. We keep the display still has 1 to 3 because in future if we develop other NOS modes , user just want to update the FPGA firmware but don't want update the MCU chip.

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.

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.