The Pro-Ject Stream Box S2 Ultra Review sets a new benchmark for network music servers. Combining a high-resolution network bridge with an audio-optimised USB output and a USB detoxifier, the Stream Box S2 Ultra transforms any modern DAC into a streaming powerhouse. Whether you're a dedicated audiophile seeking bit-perfect performance or a multi-room enthusiast, this music server delivers uncompromised clarity and detail.

Design and Connectivity

The sleek aluminium chassis (105 x 37 x 105 mm) houses dedicated power supplies that minimise digital noise, while the 375 g footprint ensures it integrates seamlessly into any hi-fi rack. Ethernet and dual-band WiFi (802.11 b/g/n/d/e/h/i) options offer stable network connectivity, and Bluetooth Classic/EDR (v2.1, v3.0, v4.0) plus Low Energy cater for flexible sourcing.

• Network Bridge: Supports PCM up to 32 bit/352.8 kHz and DSD256 with RAAT, DLNA and Shairport protocols.
• Audio-Optimised USB-A Output: USB detoxifier offers a clean, jitter-free feed to any modern DAC.
• Dual USB Inputs: Connect external drives for personal media playback.
• HDMI Output: On-screen interface when paired with an external monitor.

Sound Performance

In listening tests, the Stream Box S2 Ultra's detoxified USB output revealed a flutter-free treble extension and a more focused soundstage compared to standard network streamers. Low-level detail retrieval is outstanding, with micro-dynamics beautifully rendered. Switching between TIDAL's MQA tracks and local DSD256 files was seamless, with neither format exposing any artefacts or hiss.

Streaming and Control

With native support for TIDAL, Spotify, Shoutcast internet radio and forthcoming Roon Ready certification, the Stream Box S2 Ultra offers vast library access. Control is intuitive via the open-source Control App on iOS/Android, web browser or Roon desktop. Multi-room functionality spans up to six devices, perfect for house-wide audio distribution.

Discover more and secure your unit on our product page.

Who Should Consider the Pro-Ject Stream Box S2 Ultra?

This is an ideal upgrade for digital-first audiophiles seeking to elevate PC-to-DAC setups, vinyl purists adding digital streaming, and home automation enthusiasts craving multi-room synchronisation. The USB detox function makes it invaluable for anyone plagued by computer-born jitter.

Pros & Cons

• Pros:
• Unrivalled jitter elimination with audio-optimised USB output
• Supports PCM 32 bit/352.8 kHz and DSD256 for high-resolution playback
• Multi-room up to six zones with DLNA, RAAT and Shairport compatibility
• Seamless TIDAL, Spotify and Shoutcast integration
• Dedicated dual power supplies reduce digital noise
• Cons:
• No internal storage (requires external USB drive)
• Absence of analogue outputs (USB-only digital interface)

Ready to Stream at Its Best?

If you're ready to experience a step-change in digital audio fidelity, speak with our experts at The Audio Tailor on 1300 308 711 or email sales@theaudiotailor.com.au. We'll tailor the perfect streaming solution for your system.