AUDIO-GD R-1 MK3 Discrete R2R DAC Black

The Audio-GD R-1 MK3 is a discrete R2R digital-to-analogue converter designed to provide conversion up to PCM 32bit 384kHz and DSD512, using a matched resistor architecture driven by FPGA DSP to ensure linearity beyond 16 effective bits. This resistor ladder topology, combined with proprietary digital processing, aims to achieve a more direct analogue reproduction than Delta-Sigma conversion, while limiting the impact of jitter and clock noise on the final signal.

Designed for high-fidelity systems requiring conversion without an integrated chip and a fully discrete analogue section, it combines advanced digital processing, a pure Class A output stage without global feedback, and a linear power supply with separate R-Core transformer windings to ensure constant electrical stability.

Audio-GD R-1 MK3: R2R DAC

A discrete R2R DAC is recognised as being superior to an integrated R2R chip, such as the PCM1704K or AD5791, offering a more natural mid-high range when listening. R2R DACs filter out clock noise that is not found on the analogue signal and are less sensitive to jitter on 16-bit definitions. The analogue signal is theoretically more accurate than a DAC based on Delta Sigma technology.

Audio-GD R-1 MK3: Class A analogue stage

Based on more than 20 years of expertise, Audio-GD excels in the creation of analogue stages without negative feedback. The output circuit of the R-1 DAC benefits from this extensive research with stages made entirely of selected and matched discrete transistors. There are no surface-mount components and a minimum of components in the signal path. The final buffer stages use wide-bandwidth FET transistors in two parallel stages, ensuring low output impedance. This last section has no capacitors in the signal path. Of course, this converter features high-speed ACSS high-current outputs. There are no relays on the analogue circuit, in keeping with the spirit of “less is better”.