AUDIO-GD R-7HE MK3 Balanced DAC R2R Silver

Audio-GD is developing its HE range, composed of its most top-of-the-range products. They benefit from the longest design and testing period since the brand's inception. This R-7HE model is an updated version of the R2R-7-HE. It thus takes up everything that made the success of its predecessor, namely 4 Ladder DAC DA-7 R2R fully symmetrical and discreet, allowing support of the DSD512 and PCM 32Bit 384kHz in the best way. It adds to this an improvement in the isolated Class A power supply for the Amanero module, a larger display with new buttons on the front panel to be able to change the settings without opening the device and finally a Mini USB port on the rear panel to be able to easily perform firmware updates.

It also features a Field-Programmable Gate Array (FPGA) processor identical to those used in very high-end DACs, such as the popular ROCKNA WAVEDREAM DAC. On the restitution side, we also find the performances of the previous model, namely a sound rich in details, a great dynamics, and a wide and deep sound scene.

Audio-GD R-7HE: 2023 Edition MKIII

The 2023 version of the Audio-GD R-27 features the same design and functions as the MKII, but with new improvements.

• [New feature] A more elegant chassis with a central chamfer.
• [New feature] A 2-line screen.
• The USB and HDMI inputs use separate isolators and an isolated power supply to avoid possible interruptions in the flow from your computer or HDMI source.
• The USB input uses a bi-directional isolator that can transmit the I2S signal to the FPGA processor and receive the clock signal from it for accurate transmission of the data stream.
• The HDMI input has its own isolator for better sound quality.
• Use of asynchronous DSD clock technology.
• The SPDIF input now supports DoP.
• The FPGA processes data in parallel mode so that only one clock cycle is required to process and transmit a data frame.
• The I2S input (including USB and HDMI input) has been combined to switch to dual 32bit parallel. The SPDIF input after decoder has been combined to dual 24bit parallel. The DSD input has been combined to dual 64bit parallel.
• Revised and improved clock configuration for better synchronization.

Audio-GD R-7HE: Version FULL UPGRADE

Audio-GD R-7HE: Seamless components and connectivity

Like its predecessor and many Audio-GD products, the R-7HE uses the brand's Amanero USB technology supporting resolutions up to 32bit 384kHz. The R-7HE has 6 inputs: BNC, RCA Coaxial, Optical, HDMI I2S, RJ45 I2S, USB. These each have interfaces adapted to provide the highest sound quality. On the output side, the R-7HE offers XLR, RCA and ACSS.

Audio-GD R-7HE: Regenerative Power Supply

The integrated regenerative power supply is an electrical generator integrated directly into the unit and avoids any noise from the main power supply and thus provides an ultra-low noise AC signal to power the preamplifier. It regenerates the main power supply and blocks the noise of the electrical signal to obtain the most neutral sound.

First, a transformer converts the main voltage. DC conversion is carried out by Class A power supplies. A discrete symmetrical regenerative wave generator produces an ultra-low distortion wave at 50Hz.

Symmetrical amplifiers with powerful output stages drive regenerative transformers to produce extremely clean alternating current. This totally clean signal is then routed to separate Class A power supplies for the left and right channels.

The Class A DC power supply with a high input impedance will avoid any noise and allow the amplification stages to have a low output impedance.

In addition, the 4 R-Core transformers provide 295W of power to the system and NOVER capacitors of more than 95000µF are used to ensure a fluid current.

Audio-GD R-7HE: Filtres Oversampling & NOS

Le R-7HE propose plusieurs modes en Oversampling ou en NOS (Non-Oversampling). Si vous souhaitez choisir l'Oversampling il suffit de sélectionner la valeur "O". Si vous souhaitez choisir le NOS il faut alors choisir la valeur "N". Vous pouvez ensuite sélectionner un mode parmi les suivants afin d'adapter la restitution à votre écoute.