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AUDIO-GD R-1 NOS R2R Discrete DAC DSP FPGA USB Amanero HDMI I2S32bit 384kHz DSD512 Black

The NOS version of the Audio-GD R-1 benefits from new features and a number of improvements, with the aim of providing ever more precise and rich sound reproduction.

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2 Years warranty
 
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AUDIO-GD R-1 NOS

R2R Discrete DAC DSP FPGA USB Amanero HDMI I2S32bit 384kHz DSD512 Black

AUDIO-GD R-1 NOS DAC Discret R2R USB Amanero 32bit 384kHz DSD512

R-1 NOS edition

The NOS version of the Audio-GD R-1 benefits from new features and a number of improvements, with the aim of providing ever more precise and rich sound reproduction.

  • [New feature]  In the R-1 NOS's digital processor, zero delay technology is applied, guaranteeing exact synchronization of data and clock, considerably reducing jitter.
  • [New feature] The galvanic isolator is applied before the DA conversion and analog parts to cleanly isolate all digital inputs and their processors for a clean sound.
  • [New feature] The DA-8 modules have been replaced by two DA-7 modules with 8 groups of R2R 24bit decoders and 4 DSD decoders operating in balanced mode.
  • [Update] The use of the latest stabilized discrete servo power supply considerably reduces noise and helps reduce the heat generated by the R-1. The analog circuits remain powered by a Class A regulated power supply. A total of 8 PSU groups are integrated to power the various stages of the R-1. 
  • [Update] The design of the current signal transmission is entirely discrete, with no OPA in the signal path.


With the R-1 NOS, Audio-GD offers us a new version of the famous R2R1, this time in NOS mode, which optimizes the pure NOS mode and delivers an extremely clean musical sound. This evolution retains all the musical qualities of its ancestor: front interface for setting filters, level of oversampling, the PLL strategy / HDMI synchronization without opening the unit.

This DAC is based on R2R Ladder technology with FPGA DSP correction. Like all R2R systems, this DAC offers a formidable price-performance ratio, always combined with the technical choices that have made Audio-GD a key player in the high-definition converter market today. This device is particularly well suited to the Audio-GD NFB1 AMP preamplifier and Audio-GD Precision 3 amplifier.

AUDIO-GD R-1 NOS DAC Discret R2R USB Amanero 32bit 384kHz DSD512

Discrete R2R DAC

A discrete R2R DAC is acknowledged to be superior to an integrated R2R chip assembly such as the PCM1704K or AD5791, offering a more natural high-midrange listening experience. The technical advantages are that R2R DACs filter out clock noise not found in analog signals and R2R DACs are less sensitive to jitter on 16bit definitions. The analog signal is theoretically more accurate than a DAC based on Delta Sigma technology.

An FPGA DSP processor

The FPGA DSP in the Audio-GD R-1 DAC overcomes the inaccuracy of resistors beyond 16/21bit. The result is high precision even in high definition 24bit 384khz. These technical qualities also include: better processing of SPDIF inputs (coaxial, optical) than the usual integrated interfaces (WM8505, DIR9001), thanks to faster computing power and FIFO buffer stages that drastically reduce jitter.

AUDIO-GD R-1 NOS DAC Discret R2R USB Amanero 32bit 384kHz DSD512
AUDIO-GD R-1 NOS DAC Discret R2R USB Amanero 32bit 384kHz DSD512

Pure Class A analog stages

Based on over 20 years of expertise, Audio-GD excels in creating analog stages without feedback. The R-1 DAC's output circuit benefits from this long and incisive research, with stages made entirely of sorted and matched discrete transistors. There are no surface-mounted components and a minimum of components in the signal path. The final buffer stages are made of high-bandwidth single-ended FET transistors on two parallel stages, guaranteeing low output impedance. This last part has no capacitors in the signal path. Of course, this converter also features high-speed, high-current ACSS outputs. In the spirit of "less is better", there are no relays on the analog circuit.

Low-noise, oversized linear power supply

NFB-78.GIF


A good DAC is nothing without a quality power supply producing the lowest possible parasitic noise. The R-1 features a triple-wound, low-radiation R-Core transformer for the digital, left and right analog stages. Each voltage is distributed over a total of 13 pure Class A regulation groups, producing very low noise and fast impulse response.

Technical characteristics

Specifications
Product typeDAC R2R
SNR> 110dB
Output impedance< 10Ω (RCA/ XLR)
Output levelRCA: 2.5V
XLR: 5V
ACSS: 2mA+2mA
Frequency response20Hz - 20KHz (< -0.5dB)
THD+N< 0.03%
Input sensitivity0.5Vp-p (75Ω, Coaxial)
19 dBm (Optical)
USB 1.0 - USB 3.0
USB compatibilityWindows, OSX, Linux, ISO
Supported sample ratesUSB, IIS: PCM up to 32Bit 384kHz, DSD up to DSD512
Coaxial: PCM up to 24bit 192kHz
General
Power suppply220-240V AC 50/60Hz (100-120V AC 50/60Hz, selector inside)
Power consumption12W
Dimensions240*280*85mm
ColorBlack
Package1* Audio-GD DAC R-1 NOS
1* Mains power cable (EU plug)
1* USB-A to USB-B cable
 
Data sheet
InputUSB
InputI2S
InputSPDIF
OutputRCA
OutputACSS
OutputXLR
DAC / ADC ChipR2R LADDER DAC
Max sampling rateDSD512
Max sampling rate384kHz
ColorBlack
NetworkingNo
Remote ControlNo
 
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Average votes
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1 reviews
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 5/5
Date :
Naturel
Super service de la part d’Audiophonics, bravo pour votre rapidité de traitement et votre offre.
Concernant le dac R2R Nos : musical, naturel, les détails sont là sans être envahissants, rythme, bref du plaisir dans la matière à partir de musique dématérialisée. J’ai aussi un Chord Hugo 2 qui m’amuse beaucoup mais me fatigue parfois. Écoute casque uniquement. Construction solide avec les fonctions de base sans avoir besoin d’un écran 15 " qui brille comme un sapin de Noël. Je recommande.
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AUDIO-GD R-1 NOS R2R Discrete DAC DSP FPGA USB Amanero HDMI I2S32bit 384kHz DSD512 Black
AUDIO-GD R-1 NOS R2R Discrete DAC DSP FPGA USB Amanero HDMI I2S32bit 384kHz...
The NOS version of the Audio-GD R-1 benefits from new features and a number of improvements, with the aim of providing ever more precise and rich...

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