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Sonnet Hermes Digital Bridge

Sonnet Hermes Digital Bridge
 Sonnet Hermes Digital BridgeSonnet Hermes Digital Bridge 
(£1,000.00 Exc. VAT)

Delivery In 3-5 Days

Free U.K. Delivery


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01892 532 995

  • LAN (local area network) input
  • Coaxial Output
  • AES/EBU digital output
  • Optical  output
  • I2S output
Sonnet Digital Audio
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Why buy from us?

Sonnet Hermes Digital Bridge

At Sonnet Digital Audio we are fanatic about building the best Digital to Analogue converters.  Because of this dedication to perfection we can truly appreciate listening experiences like Roon. Roon looks at your music and finds photos, reviews, lyrics, and concert dates, and makes connections between artists, composers, performers, conductors, and producers. What you get is a searchable, surfable magazine about your music. 

And as we believe a Digital to Analogue converter is the heart of your music setup, what else can we do than to build a ROON Endpoint which will allow you to direct your digital music through our device in order to get the most sublime sound available! 

The HERMES Digital Bridge is using high quality components and combines it with the user-friendly interface from Roon Labs. Recognized for its perfect timing there hardly is another streamer product available which adds so much detail to music. 

The HERMES out of the box comes as a ROON certified digital end point, however because of its architecture it is also capable of running different platforms such as DietPi, PiCorePlayer and Volumio. ( For Volumio or Audirvana a dedicated free version for the Hermes can be found here ) This allows for even more possibilities such as playing Qobuz or Logitech Media Server content, or even being discovered in a network using UPnP. 

At Sonnet Digital Audio we do not believe in “taking prisoners”, hence the choice to provide our clients with an open platform. Using our HERMES, a client could swap the SD card installed, and open up a whole new world with content from different providers, such as Qobuz. Adding web radio and play it throughout your house, office, wherever you wish to enjoy music, installing Logitech Media Server might be the solution. As for warranty we are OK with you choosing freedom, however as long as the changes apply to the software.  

The HERMES comes with a dedicated I2S output which is based on impedance matching. This approach makes it possible to use standard UTP cable over lengths of 30 meters without loss or interference. Standard outputs like AES/EBU, Coax and Toslink are available as well. The hardware platform in HERMES enables you to stream high res music files from network attached storage, online streaming services through the powerful ROON platform or others, outputting bit perfect audio direct to your DAC.  The HERMES By Sonnet Digital Audio comes with all the connections an audiophile can wish for, and when hooking it up to your network it is a plug and play device.

Shipping typically 3-5 days
  • LAN (local area network) input:  Connect an UTP cable with your local network. The Hermes is made as a Roon endpoint and will only work in conjunction with a digital to analog converter. The Hermes expects a working Roon music server on the same local network.
  • Coaxial Output: A 75 Ohm coaxial cable should be used to connect the Hermes to other digital audio equipment like a dac for instance. The coaxial output  has a galvanic  isolation and can handle a maximum sample rates up to 192 kHz.
  • AES/EBU digital output: When using the AES /EBU digital output a special 110 Ohms XLR cable should be used to connect the Hermes to other digital audio equipment. The AES/EBU interface has a galvanic isolation and can handle a maximum sampling rates up to 192 kHz.
  • Optical  output:  A standard Toslink cable can be used to connect the Hermes to other digital audio equipment. The max. sampling rate of the Toslink interface is limited to 96kHz.
  • I2S output: The I2S connection is probably the best way to connect digital audio equipment  over short distances without intervention of all kind of interfaces like AES/EBU , Spdif or Toslink. However still I2S is no international standard in terms of standardising the format or the connectors used. The I2S standard is optimized as an  interconnection between Sonnet products but will work in most cases in conjunction with other gear. If your Sonnet product has the I2S option installed you can use a simple UTP cable.

Working principle: Linux based ROON Endpoint using precision clocks
Power supply: 10 VA. Power consumption: Standby < 1 Watt. Full operation max 6 Watts
Power requirement: 110-230 V AC 60/50Hz
Inputs: Lan (local area network) max. 100 Mbps
Outputs: 1x optical Toslink, 1x RCA coax, 1x AES/EBU and I2S.

Sampling frequency:

  • Optical : 44.1 – 96 kHz sampling.
  • Coaxial: 44.1 – 192 kHz sampling.
  • I2S: 44.1- 192 kHz sampling. 
  • Max cable length  in case of UTP CAT5e 20 meters.
  • Dimensions: hxwxd: 19x6x25 cm. Weight: 2500 gram.

UK Delivery

  • FREE delivery via DPD Local By 12pm on orders to value over £300, including one hour delivery window service 'Predict & Follow My Parcel'.
  • Royal Mail Special Delivery By 1pm costs between £5.00 - £10.00 on orders to value under £300, dependent on weight.
  • Saturday or Sunday delivery available upon request for supplemental charge.

EU Delivery

  • £25 delivery charge 'Flat Fee' via DHL Europe by Road service (5-7 days) which provides comprehensive tracking of shipments online.
  • £50 delivery charge 'Flat Fee' via DHL Europe by Air service  (2-3 days) which provides comprehensive tracking of shipments online.
    Receiver is responsible for the payment of local Duties and Taxes.

USA & Canada Delivery

  • Services based on your order being shipped to the U.S. and Canada are calculated as follows:
    £100 delivery charge 'Flat Fee' via DHL international 'Day Definite' service per parcel.
    Receiver is responsible for the payment of local Duties and Taxes.


  • Not all products are available for order into Europe, USA & Canada


  • Full manufacturer's warranty on all new purchases. Standard warranty is typically 12 months to 2 years with some goods coming with 6 years manufacturer's warranty.
  • Goods purchased in UK and EU are covered by the Consumer Contracts Regulations.

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