With the explosive growth of internet streaming services, such as Qobuz, TIDAL and Spotify, consumer interest has shifted towards network enabled devices. Unfortunately many existing great sounding products focus on a PC or Mac as a source via USB, and do not offer any network ability, either because they are too old or their main focus was not on network streaming. The solution has often been to replace them with a new and modern device, stream audio via Bluetooth or to compromise and use a smartphone or tablet via their analogue ouput to feed active speakers or amplifiers.There never was a really good solution for the consumer. Untill now. Stream Box S2 Ultra closes the gap, it offers modern connectivity with its network inputs and USB A output. This USB output is optimized for audio signals, it uses a dedicated internal power supply and only top audiophile grade components. You won‘t run into file-support issues, as Stream Box S2 Ultra acts as a bit-perfect network bridge, sending the files directly to your digital to analogue converter via USB. Since most DACs only have one USB input, we have designed Stream Box S2 Ultra also to be a USB detox device. Simply connect your PC to the micro USB input of the unit and connect our DAC to the audio output. This way you can clean the noisy signal of your PC, while enjoying your music with it. Control is simple thanks to our iOS and Android compatible “Pro-Jet Play” app. Alternately, the StreamBox S2 Ultra can be controlled directly via a USB mouse and attached monitor, web browser, or the beautiful and powerful Roon software.

Additional information
Weight0.375 kg
Dimensions10.5 × 10.5 × 3.7 cm



  • High resolution network bridge
  • Audio optimized USB A output
  • Multi-room enabled
  • Dual USB A input for external storage
  • Tidal, QoBuz, Spotify, high-res audio streaming
  • Network-enables any modern DAC with USB input
  • Internet Radio (TuneIn)
  • DLNA enabled
  • Bypasses all audio formats to the DAC
  • Cleans up the audio signal from a PC
  • Fully Roon Ready and certified
  • Shairport
  • Bluetooth
  • Uses dedicated power supplies
  • HDMI video output
  • Controllable via smart devices and PC/Laptop
  • New control app!
  • Ethernet and WiFi connectivity
  • Handmade in Europe


  • Internal Memory: 16 GB
  • Audio formats: PCM 32bit/352.8kHz, DSD256
  • Internet radio: Shoutcast
  • Supported data protocols: RAAT, Shairport, DLNA
  • Multi-room: up to six devices
  • Inputs: 2 x USB A (maximum combined current draw 1A)
  • Micro USB B (PCDetox),
  • Network (Ethernet, WiFi)
  • Bluetooth
  • Supported WiFi standards: 802.11 b/g/n/d/e/h/i
  • Bluetooth: Bluetooth Classic + EDR v2.1, v3.0, v4.0 and Low Energy
  • Outputs: audio optimized USB A, HDMI (video)
  • Outboard power supply: 18V/1A DC (included)
  • Wi-Fi antenna included

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