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HE-7 MK2

For who got love on PCM1704UK to order


(Regenerative power supply)

(Apply 8 pcs the most real like sound DA chip PCM1704UK)


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 asynchronous transfer Amanero 384 apply the FPGA synchronous clock.

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

The whole digital circuit built with 1 pc FPGA and 3 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.

Input signal sampling display.

Support external 10MHz clock input (Default is 50 ohm, 75 ohm can be custom order).

All digital process mode settings accessible by buttons on front  (No need  to open the chassis).
Firmware update port accessible on rear (Update  firmware n
o need  to open the chassis).
 

     

     

     
Please note: The product improve cause the inside or outside change without inform .
 
Summarize Use Manual Specs Custom Option Shipping Cost

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 300 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.


Normal working state display:
Leftmost digit:
         Input channel indicator, either 1,2,3,4,5 or 6 ( for details, please read below ).
2nd digit:
       
 Internal or External clock selection. When an external clock is connected, the dot on the bottom right corner will be lit to indicate the clock signal is detected ( for details, read below ).
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.
         While the rightmost digit is blinking, push the "Setting" button one time, the menu will change to page 2.

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 - RCA", for the RCA coaxial digital input;
"3 - BNC", for the BNC 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.
         Note that the Ex-Clk input on the rear panel is the 50-ohm external clock input, see below for more instructions.
         Note that the external clock output impedance must be 50 ohms, the supported output level range is 0.7-3.0V and a 50-ohm BNC cable must be used.
         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


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: Internal or External clock selection
         I (Internal) : Selects the internal clock
        E (External) : Selects the external clock
        The external clock selection is only possible after a successful clock connection is made, otherwise the display will show "Fail" on an attempt to select it.

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 once, the leftmost digit will blink, then push the right "Selector" button to set the value to "O" .
       Then push the "SETTING" button one more time, the 2nd digit will blink, then push the right "Selector" button to set the value to "8".
       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".
         
2. Settings for OS0 and phono simulation mode:
       Push the "SETTING" button once, the leftmost digit will blink, then push the the right "Selector" button to set the value to "O" .
       Then push the "SETTING" button one more time, the 2nd digit will blink, then push the right "Selector" button to set the value to "0" .
       Then push the "SETTING" button once again, the 3rd digit will blink, then push the right "Selector" button to set the value to "S" .
        
3. Settings for NOS mode with phono simulation (new option combination to get the warmest and smoothest sound ):
        Push the "SETTING" button once, the 1st digit will blink, then push the right "Selector" button to set the value to "n" .
       Then push the "SETTING" button twice, the 3rd digit will blink, then push the right "Selector" button to set the value to "S" .

        


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.
 

 

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