AUDIO-GD R-1 2021 R2R DAC DSP FPGA USB Amanero HDMI I2S 384Khz 2x Accusilicon

AUDIO-GD R2R 1 DAC DSP FPGA USB Amanero Isolé HDMI I2S 384Khz TCXOx2
With the R1, AUDIO GD offers a new version of the famous R2R1 equipped this time with a front interface for setting filters, level of oversampling, the PLL strategy / HDMI synchronization without opening the unit.

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More info

This product has been replaced by the new version, the AUDIO-GD R-1 NOS DAC.

AUDIO GD R1 2021

FPGA LADDER DAC - Full Clocks upgrade version


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Édition 2021

Le Audio-GD R-1 dans sa version 2021 profite de nouvelles fonctionnalités ainsi que de certaines améliorations, dans le but de fournir une restitution sonore toujours plus précise et riche.

  • [New feature] The USB input transmits the I2S signal to the FPGA processor and receives the clock signal from it for a more accurate signal and better sound quality.
  • [Update] The FPGA processes data in parallel. This mode of transmission allows only one clock cycle to be required for data processing or transmission, thus avoiding any clock stability problems. The I2S inputs (USB and HDMi) operate in double 32bit, the SPDIF input operates in double 24bit and the DSD input in double 64bit. The parallel transmission mode allows an overall improvement of the sound quality and transparency.
  • [Update] New configuration and clock management for greater accuracy.
  • [Update] Improved DSD asynchronous clock technology.
  • [Update] DoP support from SPDIF input.


With the R1, AUDIO GD offers a new version of the famous R2R1 equipped this time with a front interface for setting filters, level of oversampling, the PLL strategy / HDMI synchronization without opening the unit. This development keeps all the musical qualities of his ancestor.

This DAC based on technology R2R LADDER corrected DSP FPGA. Like all R-R2 systems, this DAC offers a formidable ratio pricing pleasure always allied with the technical choices that make AUDIO GD today a major player of the High Definition converters.

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Discrete DAC R2R


A discrete R2R DAC is known to be superior to an integrated R2R chip setup like PCM1704K or AD5791 offering a more natural listening acumen. The technical advantages are: The R2R DACs filter the noise of clocks that are not found on the analog signal. The R2R DACs are less sensitive to jitter on the 16bit definitions. The analog signal is theoretically more accurate than a DAC based on Delta Sigma technology.

DSP FPGA processor


The DSP FPGA installed in the DAC AUDIO GD R2R 2 allows to overcome the inaccuracy of the resistances beyond 16/21 bit. We thus benefit from anot high precision even in High Definition 24 bit 384khz. These technical qualities are also: better processing from the SPDIF (coaxial, optical) inputs than the usual integrated interfaces (WM8505, DIR9001) thanks to faster computing power and FIFO buffer stages reducing the jitter drastically

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analog stages in pure class A


Based on an expertise of over 20 years, kingwa designer AUDIO GD excels in creating analog stages without counter-reaction. The output circuit of the DAC R2R 2 benefits from this long research work incressant with stages entirely discrete transistors sorted and paired. There are no surface components and minimal components on the signal path. The last buffer stages are single-ended FET-type transistors with two-stage parallel bandwidth guaranteeing a low output impedance. this latter part has no capacitors in the signal path. Well-on this converter has high-speed outputs with high-current ACSS stage. There is no relay on the analogue circuit in the pure spirit "less is better".

AUDIO-GD R-1 DAC DSP FPGA USB Amanero Isolé HDMI I2S 384Khz 2x Accusilicon 2x Crystek

Accusilicon 318B & Crystek Clocks

This 2019 version is now equipped with Accusilicon 318B clocks, which allows the jitter (digital noise) to be moved back even further and improves the overall performance of all components and interfaces. Two Crystek clocks are also associated with the USB interface for increased performance.

Oversized linear power supply with low noise

NFB-78.GIF


A good DAC is nothing without a quality power supply that produces the lowest possible parasitic noise. R1 has a low radiation R core type transformer with triple winding for the digital, analog left and right stages. The distribution of each voltage is done on a total of 13 pure class A control units producing very low noise and a fast impulse response.

Specifications
DACR2R
Digital Input Sensitivity0.5V pp (75Ω Coaxial), 19dB on Toslink optics Td>
Distortion rate per harmonic0.003% over 20 to 20kHz unweighted
Bandwidth20 to 20kHz Td>
Output Voltage Level2.5V (RCA), 2MA (ACSS)
Signal Ratio108dB
Output impedance Td>10Ω (RCA) Td>
Adjustment oversampling from front panelX2, x4, X8
Non Over Sampling Mode (NOS)Front panel
USB and HDMI LVDS I2SPCM 44.1kHz - 384kHz to 16-32bits Td>
USB and HDMI DSDDSD64 to DSD256 Td>
Input SPDIF Coaxial Td>24bits max 44.1kHz-192kHz
Input SPDIF Optical Td>24bits max 44.1kHz - 96kHz
USB CompatibleWindows 7, 8, 8.1, 10 (requires a driver), MAC OS 10 and Linux
Clocks2x Accusilicon + 2x Crystek
Power supplyLinear power supply with 3 secondaries with 5 groups, low noise regulation in pure class A
Dimensions240 x 320 x 80mm
Weigth5kg
Accessories1x USB Cable, 1x IEC Cable
 
Data sheet
InputOptical
InputBNC
InputSPDIF
InputHDMI
OutputACSS
OutputXLR
OutputRCA
DAC / ADC ChipR2R LADDER DAC
Max sampling rateDSD256
Max sampling rate192kHz
ColorBlack
NetworkingNo
Remote ControlNo
 
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Average votes
5.0 / 5
8 reviews
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 5/5
Date :
Excellent !
Après 9 ans passé en compagnie d'un Audio-gd NFB 2.32, je ne voyais pas d'autre alternative que de le remplacé par un autre Audio-gd
Comme stipulé dans d'autre commentaires, en terme rapport performance prix, difficile faire mieux. Neutralité, nuance et restitution précise, mais plus analogique que chirurgicale...Donc plus naturel sont au rendez-vous. Il y avait déjà de ça dans mon ancien DAC et c'est pour cela que je suis resté chez ce fabricant.
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Note :
 5/5
Date :
Almost analogue palpability
Trust your ears!this dac serve the music like no others i tried in recente years. Meat and bone on vocals ,details offered with a serene tranquillity vs the frenetic house sound of delta Sigma dac! Absolute top service from audiophonics nl,no One can touch their produce selectio n. Congrats!
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Note :
 5/5
Date :
pour - de 1000 euros y a pas mieux!!
Bon, après rodage, le biniou s'est bien ouvert et y'a pas photos, le son est vraiment spatiale, hauteur profondeur largeur du spectre audible, tout est en place et très bien détaillé sans coloration particulière et cela peu importe le style joué, et à aucun moment j'ai pensé êtres sur une source numérique!
Un DAC transparent et MUSICAL!
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Note :
 5/5
Date :
Bon sang... Quel son !
En plusieurs décennies j'ai eu l'occasion de posséder au moins entre 10 et 15 DACS commerciaux + montages de diverses cartes convertisseur D/A. Philips; AKM, etc.
J'ai pourtant été totalement séduit ici par un rendu sonore inhabituel et magnifique, parfaitement équilibré proche des meilleures lectures "analogiques" tout en conservant les qualités du numérique telles : dynamique, silence; etc.
Jamais je n'avais profité auparavant d'une telle d'articulation avec autant de sons à la fois élégants "filés" et fruités à souhait à partir des Dacs conventionnels.
Cet Audio GD R2R R1 proposé à un prix encore raisonnable pour un DAC haut de gamme, procure une musicalité proche de systèmes de lecture vinyle de très haut niveau beaucoup plus coûteux.
De surcroit, ce DAC est exceptionnellement bien conçu et construit sans aucun compromis.
Au-delà de sa conversion par résistances (R2R), de nombreuses alimentations indépendantes en font un véritable "double mono " avec étages de sortie symétriques à composants "discrets", (transistors FET et non AOP).
Ces sorties fonctionnent en pure Classe A et sans contre-réaction, ce qui est quasi introuvable ailleurs.
En bref ce DAC m'a épaté et je ne peux que le recommander ! !
( Je précise que je n'ai pas d'actions chez Audio-GD....)
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Note :
 5/5
Date :
Super rapport qualité prix
Je confirme la qualité du son, mon meilleur dac dans cette gamme de prix. Son en 3 D analogique precis et reposant. Mon streamer bluesoundnode 2 I fait un pas de géant. Class A oblige !
Je redecouvre mes cd Cet appareil mérite un câble coaxial haut de gamme. Déçu par le canare bnc je suis parti avec un audioquest pour pas le nommer. La position nos est top.
J'enlève une étoile car prise coaxial et bnc sont sur une entrée commune.
Penser à éteindre l'appareil qui n'est pas en service !
Indiquer sur la façade la source par un chiffre bof
Mais audio-gd est pardonné quand je me régale avec la musique.






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AUDIO-GD R-1 2021 R2R DAC DSP FPGA USB Amanero HDMI I2S 384Khz 2x Accusilicon
With the R1, AUDIO GD offers a new version of the famous R2R1 equipped this time with a front interface for setting filters, level of oversampling,...

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