AUDIO-GD D-57 Balanced DAC Dual ES9028Pro FPGA Amanero 3x TCXO 32bit 384kHz DSD

AUDIO-GD D57 Balanced DAC Dual ES9028Pro FPGA Amanero 3x TCXO 32bit 384kHz DSD

Audio-GD offers with its D57 balanced DAC a top-of-the-range HiFi product, intended to provide the most audiophiles with a very high quality reproduction. For that the brand does not skimp on the means by integrating high-end components: Double converter ES9028Pro, FPGA Altera Cyclone, USB Amanero interface and triple clocks TCXO.

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Shipping date: 23-07-2019.

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AUDIO-GD D57

Balanced DAC Dual ES9028Pro FPGA Amanero 3x TCXO 32bit 384kHz DSD

Audio-GD DAC Symétrique Double ES9028Pro

A resolutely high-end DAC

Audio-GD offers with its D57 balanced DAC a top-of-the-range HiFi product, intended to provide the most audiophiles with a very high quality reproduction. For that the brand does not skimp on the means by integrating high-end components: Double converter ES9028Pro, FPGA Altera Cyclone, USB Amanero interface and triple clocks TCXO.

Audio-GD D57 Double DAC ES9028Pro

Dual ES9028Pro DAC

The D57 is based on two ESS ES9028Pro chips to deliver high audio performance in stereo and mono. These converters use the HyperStream II ESS architecture to achieve a wide dynamic range and low THD+N. The DAC also supports high resolution files, up to 32bit 384kHz and DSD/DXD via its USB and I2S inputs. Furthermore, offering two converters instead of one improves both the dynamic range (DNR) in mono at 135dB and the THD+N at -120dB. For comparison, the ES9028Pro duo provides a better 3dB DNR compared to an ES9028Pro alone.

Moreover, in mono mode, the unit has one converter per channel, which improves crossover (frequency separation) and therefore provides a wider and more precise sound scene.

Audio-GD D57 DAC ES9028

Altera Cyclone FPGA

The DAC ES9028Pro torque is directly supported by an Altera Cyclone FPGA. This allows to separate the audio data of each ES9028Pro in they are used in mono mode. It also allows to re-synchronize the signal and place the signals in a FIFO buffer to ensure a jitter at the lowest output. The FPGA also incorporates a more powerful SPDIF interface than that available in the ES9028Pro.

Audio-GD D57 FPGA Altera Cyclone

USB Amanero interface and HDMI I2S

As usual, Audio-GD chooses to integrate an Amanero Combo 384 USB interface in its device. This supports high sampling rates and bitrates, up to 32bit 384kHz, as well as DSD. The DAC also has an HDMI I2S input, allowing you to take advantage of these sample rates and bitarates as well. Enough to appreciate his music in the best of ways.

Attention: To use the USB interface from a Windows device, please install the following driver : Download Amanero USB driver.

Audio-GD D57 TCXO

Triple TCXO

To ensure a low jitter signal, the Audio-GD D57 couples its DAC ES9028Pro and FPGA to a series of 3 TCXO clocks.

Discrete output stage

The last stage of the DAC is its analog output stage. This is extremely important to ensure excellent sound quality. For this it uses a design based on discrete transistors and Vishay resistors. Output buffers are balanced FETs. In addition, the ACSS outputs operate in pure Class A and without feedback, so as to offer the purest and most faithful sound possible.

Audio-GD D57 Schema de fonctionnement

A consistent PSU

The Audio-GD DAC has a total of 14 power supply units. 11 ultra-fast linear power supply units combined as a two-stage power supply allow the digital circuit to obtain a clean power supply signal.

In the same way, 2 groups of pure Class A power supplies can supply the analog circuit.

Finally, a separate power supply circuit powers the display and control system to avoid electrical disturbances.

Technical characteristics

Specifications
DAC2x ESS ES9028Pro
FPGAAltera Cyclone
Clocks3x TCXO
SNR> 120dB (XLR output)
SNR> 120dB (XLR output)
THD< 0.0003%
Output impedance4.7Ω
Output levelsRCA : 2.5V
XLR : 5V
ACSS : 2.2MA
Input sensitivityCoaxial : 0.5Vp-p 75Ω
Optical : 19dBm
Frequency response20Hz - 20kHz (< -0.1dB)
Sampling ratePCM via USB / I2S : up to 384kHz
DSD via USB / I2S : up to DSD256
Coaxial : up to 192kHz
Optical : up to 96kHz
Connectors : Inputs
Coaxial SPDIF1x
BNC SPDIF1x
Optical Toslink1x
I2S via HDMI LVDS1x
USB (Amanero)1x
Connectors : Outputs
Balanced ACSS1x
Balanced XLR1x
Single ended RCA1x
General
Supported OSWindows, OSX, Linux
Consommation30W
Dimensions240 x 360 x 80mm
Housing materialAluminium
ColorBlack
Accessories1x Power cable
1x USB Cable

Digital filters configurations & Auto Dark Mode

To change the PCM and DSD filters, press the Setting button once. The left display will flash for a few seconds. After that you can choose a PCM filter from 1 to 7 using the left and right arrows. Pressing the "Setting" button again will cause the middle display to flash for a few seconds. After that, use the left and right arrows to select a DSD filter from 4 to 7.

It is also possible to select an automatic sleep mode for the camera screen. To do so, press the "Setting" button again. The left and right display will flash for a few seconds. By pressing the right arrow, the display will show ON or OFF. If OFF is selected, the display will automatically turn off after 10 seconds without pressing a button. If ON is selected, the display remains constantly on.

DISPLAY (MIDDLE)DSD FILTERS
447K
550K
660K
770K
DISPLAY (LEFT)PCM FILTERSFIR2FIR3
1Fast roll-off, LinearONON
2Slow roll-off, LinearONOFF
3Fast roll-off, MinimumOFFON
4Slow roll-off, MinimumOFFOFF
5Fast roll-off, ApodizingONON
6Fast roll-off, HybridONON
7Brickwall fireOFFOFF

Mapping I2S / LVDS
A synthesis of main IIS on LVDS pinouts mapping is available here.
 
Data sheet
InputUSB Amanero
InputOptical
InputBNC
InputSPDIF
InputI2S via HDMI
OutputRCA
OutputACSS
OutputXLR
DAC ChipES9028PRO
Max sampling rateDSD256
Max sampling rate384kHz
ColorBlack
Components / ChipDual ES9028Pro
MaterialAluminium
 
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Ca marche!
Pas encore testé l'entrée USB mais en spdif ça marche du tonnerre. Beaucoup de détails, très belle scène, ponctuelle et stable. Relié en ACSS avec un pré C2 du même constructeur c'est nickel. Parfait silence de fonctionnement, aucun bruit mais beaucoup de musique.
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AUDIO-GD D-57 Balanced DAC Dual ES9028Pro FPGA Amanero 3x TCXO 32bit 384kHz DSD
Audio-GD offers with its D57 balanced DAC a top-of-the-range HiFi product, intended to provide the most audiophiles with a very high quality...

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