Audio-GD R-28 2022 Edition - R2R All-in-One DAC/Amp
Audio-GD R-28 2022 Edition - R2R All-in-One DAC/Amp
Audio-GD R-28 2022 Edition - R2R All-in-One DAC/Amp
Audio-GD R-28 2022 Edition - R2R All-in-One DAC/Amp

Audio-GD R-28 2022 Edition - R2R All-in-One DAC/Amp

CHF 1,449.00

Delivery time on request.
(All devices are handmade to customer order)

Full Upgrade Version

  • incl. Metal remote control


  • Integrated DAC/headphone amplifier in one device
  • Digital input signal sampling Display and simulate vinyl sound
  • Fully balanced discrete transistor preamp and preamp in one
  • Built-in true balanced headphone amplifier with a maximum output power of 9500mW, which can easily drive most headphones.
  • 8 groups of fully discrete R-2R DA modules that can be combined into true symmetrical push/pull decoders.
  • 4 groups of full discrete symmetric native DSD decoders.
  • Fully discrete true symmetrical power transmission design.
  • 2pcs ultra high frequency 90/98MHz Accusilicon 318B femtosecond clocks provide synchronous clock for the whole unit without PLL up frequency.
  • 32bit / PCM384K /DSD512 asynchronous transmission Amanero 384 use the FPGA synchronous clock.
  • The whole digital circuit built with 1 pc FPGA and 5 pc CPLD programmable chipsets to separate the different configured circuits for avoiding interruption, data process in parallel mode.
  • Support firmware updates to improve sound quality.
  • All digital process mode settings are accessible via front panel buttons (no need to open the case).

Unique jitter elimination technology

Jitter has always been considered the main reason why digital systems sound quality is inferior to high-end analog systems.
In some traditional DAC designs, the clock processing method is to follow the clock of the signal source and to restore it, and some designs also offer the possibility to reduce jitter, but with limitations when the jitter level is large.

This common solution gives good measurements in laboratory tests. In practice, however, most signal sources have large jitter values, so that the resulting sound quality is not satisfactory.


Channels imbalance
< 0.05DB
Frequency Breadth
20Hz - 20KHz (< - 0.5DB)
Output Level
Headphone output : 19V RMS (balance)

Preamp Variable output : 19V RMS (balance)

DAC Fixed output : 5 V RMS (balance) 
Headphone amp output power level
(Only for headphones over 15 ohms.)

Balanced mode

9500mW / 25 ohm
8000MW / 40 ohm
3500MW / 100 ohm
1200MW / 300 ohm
600MW / 600 ohm

Output impedance
1 ohm / Headphone output

5 ohm / DAC / Preamp output
Input Sensitivity
0.5 Vp-p(75 Ohms, Coaxial)
19 dBm (Optical)
Support Operate Systems (USB)
Windows, OSX, Linux, ISO
Support Sampling
USB & IIS : 44.1kHz - 384kHz /32Bit DSD64-512
Coaxial mode: 44.1kHz - 192kHz
Optical mode: 44.1kHz - 96kHz
Power Requirement
1 version 100-120V AC 50/60 Hz

2 version 220-240V AC 50/60 Hz
Power Consumption
Package Weight
Approximately 85KG

W360 X L360 X H85(MM, Fully aluminum )
AC power cord X1
USB cable X1