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Audio-GD - D77 - Balanced Dual ES9038 PRO FPGA PRO DAC (DSD, DxD, Amanero USB)

€ 1.129
€ 933 ohne MwSt
TCXO Upgrade
Additional RCA output (Replacing ACSS)Information
Power cable (Default C13 EURO)
Audio-GD - Digital SPDIF coax interlink RCA (1m)Information
Audio-GD - Digital SPDIF coax interlink BNC (1m)Information
Audio-GD - Analogue RCA interlink stereo pair (1m)Information
Audio-GD - ACSS Analogue balanced interlink (mini-xlr)Information
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  • Beschreibung
  • Spezifikationen

Audio-GD - D77.38 (Balanced DUAL ES9038Pro & FPGA Amanero USB DAC)

D77 is Audio-GD's flag-ship - dual -  Sabre ES9038Pro based Digital Analogue Converter. An additional FPGA was implemeneted to separate the data feed to each dual ES9038 Pro in mono mode. It re-clocks and FIFO's all incoming signals to make sure the output data is (almost) free from jiter and reaches optimal timing with its source clock. The FPGA design includes a high performance SPDIF interface, replacing the less good SPDIF interface of the ES9038 Pro .

All parts and components are selected based on excellent sonic and measurements performance. Components are e.g. from DALE resistors (USA), WIMA capacitors (Germany)  and NOVER parts (UK) . The used components but also the technical design (e.g. discrete analogue section and high speed FPGA's) of this system were being selected after many years of experience and practices and are considered to perform and provide sublim sonic results. Supporting todays high resolutions and up to date interfaces like USB and I2S.

Dual ES9038 Pro design, one per channel in mono mode, this improves the channel crossover and soundstage is larger and extremely precise.

TCXO Upgrades Included!

SUMMARY

  • Discrete True Balanced DAC
  • Built in FPGA processor to reject external jitter
  • Dual 32bit / 768K Sabre ES9038Pro
  • 32bit / 384K Asynchronous Transfer Amanero Combo 384
  • Built in OCC and TCXO ,no upgrade options
  • OCC wires & low-jitter TCXO clocks applied
  • Discrete analogue output & power supply
  • Fully DC coupled design without capacitors in signal path
  • Non- feedback ACSS analog output control
  • Total of 15 regulated low noise class A power circuits
  • Over 40,000uF power capacity to purify the class A power supply
  • high-grade matched transistors only
  • Amanero Combo384 with isolation

INPUTS

  • 4 Coaxial BNC + RCA SPDIF
  • 3 Optical Toslink
  • 2 HDMI LVDS
  • 1 USB Amanero

OUTPUTS

  • ACSS balanced
  • XLR balanced
  • RCA single ended

FPGA Responsibilities

  1. Separate the data for left en right channel for each ES9028 Pro mono for best performance
  2. Re-clock process and FIFO design for all inputs; output data is synchronized with clock signal to reject jitter.
  3. Built in high performance SPDIF interface  to avoid usage of the poor performing SPDIF interface inside the ES9028 Pro.

ANALOGUE OUTPUT STAGES

currentoutput

The final step the of the signal flow are the analog output stages, they can have a massive effect the total sound quality.
The output stages are directly placed behind the ES9038 pro dac chips and they are built with discrete transistors through-hole components becuase this offers the best results we discovered after many years of experience.
The high speed ACSS (propitiatory Audio-GD current driven signal processing system) are non feedback designed and work in current signal mode, hence the dual ES9038 pro output is in current mode amplified by the ACSS amp. No shortcuts are taken; a complete current driven solution. 
The output buffers are the pure class A , built with 4 pcs 150W (in total 600W ) per channels; to drive even the most difficult headphone without any problem. The class A output stages will make sure you will get the most pure and real sound reproduction.


USB SUPPORT

Download USB Amanero drivers for Windows 10
Download USB Amanero drivers for Windows 7 & 8

No drivers required for Linux and/or Mac OS
OSX 10.6+ and Linux with UAC2 compliant kernel
Microsoft Windows: KS/Wasapi/WDM/ASIO

 

DIGITAL CONFIGURATION GUIDE
IIR Filters (DSD only) IIR0 IIR  
47K ON ON
50K OFF OFF  Default
60K OFF ON
70K ON OFF
       
FIR Filters (PCM only) FIR 0 FIR 1 FIR 2
Fast roll-off,  Linear ON ON ON
Slow roll-off, Linear ON ON OFF  Recommended
Fast roll-off, Minimum ON OFF ON
Slow roll-off, Minimum ON OFF OFF
Fast roll-off, Apodizing OFF ON ON
Fast roll-off, Hybrid OFF OFF ON
Brickwall filter OFF OFF OFF  Default

The filter Settings are for personal preference. The default setting is typically the best for most listeners. Feel free to adjust it according to your preference after you are familiar with the sound. IIR stands for Infinite Impulse Response. These settings will likely not offer significant sonic difference.

Hersteller-URL: http://audio-gd.com/Pro/dac/D_77/D_77EN.htm
Gewicht: 5 kg
Breite: 360 MM
Länge: 240 MM
Höhe: 80 MM
Hersteller: Audio-GDAudio-GD

Spezifikationen

Dual Sabre ES9038Pro
>120DB (XLR output)
2.5V (RCA) | 5V (XLR) | 2+2mA (ACSS)
0.5 Vp-p
19 dBm
USB: 44.1 - 384kHz | Coax: 44.1 - 192kHz | Optical: 44.1 - 96kHz
1.0, 1.1, 2.0 & 3.0
Windows, iOS, Linux
15
45
W430 X L430 X H85 (Alumunium)
USB Cable
IEC Power Cord
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