Pro-Ject

Stream Box S2 Ultra Network Streamer

The Universal Solution For Hi-Res Streaming In Your Home.

With the Stream Box S2 Ultra, Pro-Ject created a completely new product for the streaming world that’s Roon Ready. The sleek little box has the power to upgrade and future proof your favorite USB DAC. Its main goal is to be a universal device that can get any USB DAC into the network, upgrading your favorite high-end DAC with modern streaming capabilities that will future-proof your investment.

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Future-proof Your Favorite DAC

Gives modern streaming capabilities to any USB DAC — a truly universal toolbox for high-end audio that will transform your favorite DAC into a streamer.

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Raspberry Pi Inside & Roon Endpoint

Tiny, but mighty. With the power of Raspberry Pi, you will never run out of ways to connect your devices and take control of your music. It might be small, but this toolbox has the largest feature-set we’ve seen at this price-point.

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USB Detox Device

Special “cleansing” circuitry clarifies the noisy USB output from your computer or smart device, giving you a pristine home audio experience for you and your guests to enjoy.

Stream Box S2 Ultra won EISA’s 2018-2019 “Best Product” of the year as a streamer, but streaming is not the only thing it excels at. Powered by the popular open-source Raspberry Pi platform, it features never before seen control scenarios and unprecedented audio performance. With USB, HDMI, Ethernet, Bluetooth, Airplay, Roon and so much more, adding the Stream Box S2 Ultra is a smart addition to your home audio setup your guests will appreciate.

The ways you can connect the devices you already own to control your music with Stream Box S2 Ultra are endless... Borrow a friend's USB stick and jam out in the living room, or Bluetooth your Spotify playlist directly to the unit from your phone. Plug in a mouse and connect a keyboard to either of the two USB inputs and your little control hub is always ready — at your command. Power users will have the most fun using the HDMI port with a touch screen with hands-on control for the most tactile user experience.

Adding this to your wireless network will open many possibilities for you to stream high-resolution audio with bit-perfect quality to your favorite DAC. 

With multi-room support for up to six devices, whether it’s with Roon, a DLNA compatible networked NAS, storing your entire music collection, a friend’s USB thumb drive plugged into the front panel, or your favorite streaming service, Stream Box S2 Ultra integrates all of it. The Volumio software can see Tidal, Qobuz, Spotify, or web radio playing directly from the Stream Box Ultra. When you select either Bluetooth or iOS input in the Stream Box Ultra’s software, you can Bluetooth directly to the unit from your Android phone or any Apple iOS device using Airplay.

Pro-Ject Stream Box S2 Ultra can pass MQA to your DAC with bit-perfect audio and it’s Roon Ready — plus the USB Clarifier mode will “clean” the noisy digital audio output coming from computers.

We’ve never seen so much packed inside something so small for this price.

  • High-resolution network bridge
  • Audio optimized USB A output
  • Multi-room enabled
  • Dual USB A input for external storage
  • TIDAL supported
  • Spotify
  • Network-enables any modern DAC with USB input
  • Internet Radio
  • DLNA enabled
  • Bypasses all audio formats to the DAC
  • Cleans up the audio signal from a PC
  • Roon Ready (in progress)
  • Shairport
  • Bluetooth
  • Uses dedicated power supplies
  • HDMI video output
  • Controllable via smart devices and PC/Laptop
  • New control app!
  • Ethernet and WiFi connectivity
Audio Formats PCM 32bit/352.8kHz, DSD256
Internet Radio TuneIn
Streaming Services TIDAL, Spotify, Qobuz
Supported data protocols RAAT, Shairport, DLNA
Multi-room Up to six devices
Inputs 2 x USB A
Micro USB B (PC-Detox)
Network (Ethernet, WiFi)
Bluetooth
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)
Controllable via App, Web Browser, Roon
Weight 375 g (without power supply)
Dimensions (WxHxD) 105 x 37 x 105 mm
More Information
Series S2 Line
Weight 0.80 lbs
Supported Formats PCM 32bit/352.8kHz, DSD256
Inputs 2 x USB A, Micro USB B (PC-Detox), Network (Ethernet, WiFi), Bluetooth,
Outputs Audio optimized USB A, HDMI (video)
Wifi Enabled 802.11 b/g/n/d/e/h/i
Features Bluetooth Audio Streaming, Bluetooth Enabled, DLNA Certified, DSD Capable, Ethernet Port, External Power Supply, HDMI Inputs, Internet Ready, Low Operating Noise, Multi Room, Music Streaming, Roon Airplay, Roon Ready, Roon Streaming, Streaming Enabled, Streaming Technology, USB, USB DAC, USB Port, WiFi Enabled, Wireless
Roon Status Roon Ready
Product Manual Download
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