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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 : USD968 (Dual ES9038 Pro included TCXOs upgraded )
Please send your address, name  to
audio-gd@vip.163.com get the quote.

   

    

     
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Amanero combo 384 Intruduce and driver download

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 .I  don't like other design with  multiple conversion to the  signal between current and voltage. 
           The output buffers are the pure class A design , built with 4 pcs 150W (in total 600W ) on every channels, to drive the most headphones without  difficulty .
           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 14 groups PSUs . 
           A total 11 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.
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