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Auralic Sirius G2.1 - Upsampling Processor


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The Auralic Sirius G2.1 Upsampling Processor stands as the fourth addition to the award-winning G2.1 Series of AURALiC products. The Sirius G2.1 improves and optimises signals from all sources, whether they are high-resolution files or streams from an inferior source or format.

With the SIRIUS G2.1, compressed, lossy, and poor recordings all have the potential to be improved, thereby upgrading your overall experience. Because SIRIUS G2.1 utilises an open standard protocol, it can also be connected to any brand of DAC. This delivers a global variety of sample rates and formats among other functions and features.

SIRIUS G2.1 will provide universal balance to a world of varied formats, resolutions, DAC chip topologies, and algorithm types.

A Universal Approach to High-Performance Across All Formats

SIRIUS G2.1 stands to improve your listening experience by employing advanced processing techniques. Poorly made recordings and even early digital recordings can benefit from SIRIUS G2.1’s impressive processing firepower. This process optimises less-than pristine recordings by resampling the signal in a manner that potentially improves upon the experience of listening to an inferior recording.

Getting the Most From Your DAC

All DACs are built with a “sweet-spot,” point where each DAC circuit excels at a resolution or format. DAC circuits built for DSD playback sound better when playing DSD and PCM DAC topologies perform better when fed PCM. By resampling to a format within the DAC’s “sweet spot,” the chip is allowed to play to its strengths, by lessening the processing requirement of the DAC.

A World First

SIRIUS G2.1 provides multiple inputs and outputs, allowing you to connect to a variety of digital sources and DACs. AURALiC’s spirit of innovation continues to put forth market-first features, as exemplified by SIRIUS G2.1’s unique ability to deliver an upsampled DSD signal to any compatible USB DAC, the first product in the world to do so.

Auralic Sirius Rear Inputs

Optimise by Equalising

The most important factor affecting the quality of playback in your system is not the cables, components, or speakers, but instead the room in which you play your music.

SIRIUS G2.1 can compensate for the room with its 8-band parametric equaliser feature, allowing you to optimise for your environment without spending tens of thousands on a complete room build or renovation.

Perfect the Imperfect

SIRIUS G2.1 offers a speaker placement function to compensate for real-world problems, allowing you to deal with barriers to perfect sound in the digital domain. While it’s necessary to place your speakers as best you can in the room first, our speaker placement function could mean the difference between poor and great sound in a less-than pristine environment.

The Power of Digital Processing

SIRIUS G2.1 is powered by the AURALiC Proteus G2 Co-Processing Platform; which harnesses a Xilinx XC7A200T FPGA chip at its heart, bolstered by 512 MB of DDR3 memory.

This FPGA chip contains more than 200,000 logic cells and 740 DSP slices, all combining to provide unparalleled levels of data processing capability. SIRIUS G2.1’s computational power and efficiency are achieved in part because of the design decision to employ a dual-processing platform structure, which doubles capacity.

While an AURALiC Tesla G1 handles hardware control, the Proteus G2 focuses its efforts on music data processing.

More to Control

Smart-IR is just that - a smarter solution for controlling your SIRIUS G2.1. As with all AURALiC products, Smart-IR allows you to control certain functions of the SIRIUS G2.1 from any number of different remotes you already own.

For example, you may program a remote to quickly switch between the four different digital filters by assigning a filter to individual buttons on that remote. This function is easily accessible in the SIRIUS G2.1 menu structure and provides you with yet another way to control not just SIRIUS G2.1, but your entire G2/2.1 stack.

What's in the Box?

  • AURALiC SIRIUS G2.1 - Upsampling Processor
  • User's Guide
  • USB Cable
  • Power Cable
  • Lightning-Link Cable

Technical Specifications

Audio Inputs

  • Lightning Link: (Up to 384K/32bit, DSD512)
  • USB Audio: (Up to 384K/32bit, DSD512)*
  • AES/EBU: (Up to 192K/24bit, DSD64 via DoP)
  • Coaxial: (Up to 192K/24bit, DSD64 via DoP)
  • TOSLINK: (Up to 192K/24bit, DSD64 via DoP)

Audio Outputs

  • Lightning Link (Up to 384K/32bit, DSD512)
  • USB Audio (Up to 384K/32bit, DSD512)**
  • AES/EBU (Up to 192K/24bit, DSD64 via DoP)
  • Coaxial (Up to 192K/24bit, DSD64 via DoP)
  • TOSLINK (Up to 192K/24bit, DSD64 via DoP)


  • THD+N: <-165dB (Resample to PCM 44.1K - 384K)
  • THD+N: <-155dB (Resample to DSD128 - DSD512)
  • THD+N: <-150dB (Resample to DSD64)

Processing Features

  • Signal Reclock and Jitter Removal****
  • PCM and DSD Resampler
  • 8-Band Parametric Equalizer
  • Speaker Placement Compensation
  • High Precision Digital Volume Control

Processing Platform

  • AURALiC Tesla G1: for general hardware control
  • AURALiC Proteus G2: for music signal processing

Power Supply

  • Triple-Channel Purer-Power internal linear power supply, 10uV low noise design for audio circuits

Internal Clock

  • Triple Femto Clocks for Digital Outputs, USB Output and Proteus G2

Noise Elimination

  • Dual Galvanic Isolation for digital and USB audio outputs
    Unity Chassis II with copper EMI shieling enclosure


  • Gigabit Ethernet (For firmware upgrade use)

Power Consumption

  • 50W at Max

Dimensions - W x D x H

  • 13.4 x 12.6 x 3.7 in. (34cm x 32cm x 9.6cm)
  • Weight: 21.0 lbs (9.5 Kg)


We offer Free Delivery on orders to the UK Mainland over £100.


Our staff are passionate about what they do and can provide advice and assistance on your purchase.


You can return any unwanted and unused item within 30 days and get a full refund.


Orders can be placed on our fully SSL-secured checkout with Debit / Credit Cards or via PayPal, Apple Pay and Google Pay. 

The products we use and sell are of the highest quality and we trust them wholeheartedly, but every now and again a product has a fault that is covered under the manufacturers warranty.

In the event of such an occurance please contact us via email at to proceed with the warranty process.

Below is a list of all the Manufacturers warranty timeframes with any special instructions for extended warranties:


  • 5 Years standard Manufacturers warranty


  • 5 Years with Installation by an Authorised Installer (Studio Incar is an Authorised Installer)
  • 1 Year if you are doing your own Installation
  • 2 Years if you register the product with the UK supplier


  • 2 Years standard Manufacturers warranty


  • 1 Year Standard Manufacturers Warranty
  • 2 Year Extended Warranty - Product Registration within 30 days of Purchase


  • 1 Year standard Manufacturers warranty
  • 2 Years if you register the product with the UK supplier


  • 6 Months standard Manufacturers warranty


  • 1 Year standard Manufacturers warranty

Chord Company

  • Lifetime Warranty


  • 2 Years on Car Audio Products - No Extendable Warranty
  • 2 Years standard Warranty on Home Audio Products
  • up to 8 Years Extendable Warranty on Home Audio Products when you register at Dynaudio


  • 1 Year Standard Manufacturers Warranty
  • 2 Years Extended Warranty when registered with Focal


  • 2 Years Standard Manufacturers Warranty


  • 1 Year standard Manufacturers warranty
  • 2 Years if you register the product with the UK supplier

HiFi Rose

  • 2 Years Standard Manufacturers Warranty

JL Audio

  • 1 Year for Speakers and Subwoofers
  • 2 Years for Amplifiers and Processors


  • 1 Year Standard Manufacturers Warranty

Peachtree Audio

  • 2 Years Standard Manufacturers Warranty
  • 3 Years Extended Warranty if Registered with Peachtree


  • 2 Years Standard Manufacturers Warranty
  • 3 Years Extended Warranty if Registered with Pro-Ject


  • 4 Years for Passive Loudspeakers
  • 1 Year for Active Loudspeakers / Subwoofers
  • 5 Years for Passive Loudspeakers if Registers with Q Acoustics
  • 2 Years for Active Loudspeakers / Subwoofers if Registered with Q Acoustics


  • 1 Year Standard Manufacturer Warranty


  • 1 Year Standard Manufacturer Warranty


  • 2 Years Standard Manufacturers Warranty
  • 3 Years Extended Warranty if registered with Wharfedale
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