D-77
 (Dual ES9038Pro +1 FPGA )

Dedicated Discrete Fully Balanced DAC
Built In FPGA Processor to Reject Jitter 
Dual Sabre ES9038Pro
DSD , DXD 32bit / 384K Support From USB / HDMI
Built with OCC and Hi-end parts
　

Price:  ( Exclude shipping cost)
D-57:                                              USD768  (Dual ES9028Pro)
D-77 standard version:                  USD968  (Dual ES9038Pro,Femtosecond TCXO *3 )
D-77 Full Clocks upgrade version: USD1033 (Dual ES9038Pro,Femtosecond Accusilicon *3upgrade the stock clock and Femtosecond Crystek *2 upgrade on USB interface)
Please send your address, name  to audio-gd@vip.163.com  get the quote.
Accusilicon clocks:
       
Crystek clocks:


Click to download the driver of  Amanero combo 384

Audio-gd products had design and test based on the AP SYS-2722 (The top-drawer professional equipment in world)


The different between dual ES9038 Pro and single ES9038 Pro is large:
                The different not only the DNR, but the dual ES9038 Pro working under mono mode, the channel crossing is improved for offer a larger and exact sound stage.

 
            Even the ESS9028 Pro, working under mono mode, its DNR had 3DB better than one ES9038 Pro .


The FPGA is important in the D-77:
           1, Separate the data feed to dual ES9038 Pro for working in mono mode.
           2, Clock re-clock process and FIFO design for all inputs , the output data can exact synchronisation with clock signal, reject jitter.
           3, Built in high performance SPDIF interface , bypassing  low performance SPDIF interface of the ES9038 Pro .
What is  the FPGA duty  in the D-77:
           1, Separate the data feed to dual ES9038 Pro for working in mono mode.
           2, Clock re-clock process and FIFO design for all inputs , the output data can exact synchronisation with clock signal, reject jitter.
           3, Built in high performance SPDIF interface , bypassing  low performance SPDIF interface of the ES9038 Pro .

Full discrete output stages:
           The signal last stage is  the analog output stags , they greatly  effect the whole DAC sound quality.
           The output stages working after ES9038 pro, they are full discrete transistor built with hole parts but not SMD parts .
           The high speed ACSS amps work as the signal gain and processing , they are of non feedback design and working in  current signal mode  . the dual ES9038 pro output [current signal] goes through the ACSS amp .
           In our design  output stages  working in pure class A , and without any negative feedback for the most pure and life like  sound reproduction .
           There are 4 pcs OPA built in as DC servo , so the DAC can be  working well without coupling caps  and output the most neutral sound.


Heavy power supplies design:
           There are in total 16 groups PSUs . 
           A total 13 groups of ultra speed linear PSUs  (dual stages PSU to  remove the power interruptions ). PSUs deliver cleanest power  to allow  digital circuits working under best conditions .
           2 groups of pure class A PSUs to  power  to the analog circuits and deliver most  analog sound .
           The control and display circuits are powered by a separate PSU  to  avoid adding any additional noise to the rest of the circuit.