Name: Pro-Ject Stream Box S2 Network Streamer Silver
Brand: Pro-Ject
Price: 399.0 AUD
Availability: InStock

Pro-Ject Stream Box S2 Network Streamer Silver

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A compact network streamer from Pro-Ject with multiroom support, an ESS9023 DAC and three outputs: fixed RCA, variable 3.5 mm and optical. It plays files up to 24-bit / 192 kHz and is controlled from the Pro-Ject Stream S2 app.

Pro-Ject describes the Stream Box S2 as a miniature multiroom streamer designed to match the look of its S2 range of compact components. This listing is the silver finish.

Streaming

Spotify, TIDAL, UPnP, DLNA, AirPlay

Resolution

Up to 24-bit / 192 kHz

DAC

ESS9023

Outputs

RCA fixed, 3.5 mm variable, optical

Network

Ethernet, WiFi 802.11 b/g/n

Size (W × H × D)

103 × 37 × 122 mm

Why you will love it

Three outputs

Pro-Ject says three outputs suit different audio chains. The RCA output is a fixed line-level output for a preamp. The 3.5 mm output is variable, for active speakers or power amplifiers. The optical output passes a digital signal to an external DAC.

There is also a 3.5 mm line input and a USB-A input.

Pro-Ject Stream Box S2 in silver, rear panel with Ethernet, optical out, line in, variable out, fixed RCA out and power input

Multiroom and stereo pairing

Pro-Ject says several Stream Box S2 units can form a multiroom setup. Multiroom streaming is at CD quality (16-bit / 44.1 kHz), and Pro-Ject limits the zones to 10 over Ethernet or 6 over WiFi.

Two units can also be paired as a stereo pair with assigned left and right channels. Pro-Ject suggests placing a unit next to a pair of active speakers to make them wireless.

Services, formats and control

Pro-Ject says the Stream Box S2 comes with TIDAL and Spotify, plus TuneIn and iHeartRadio internet radio. It supports UPnP and DLNA, and Pro-Ject says its AirPlay support (Shairport) is another way for Apple device users to send music to it.

It plays MP3, FLAC, WAV, ALAC, APE and AAC files, up to 24-bit / 192 kHz. The control app is called Pro-Ject Stream S2 and is available for iOS and Android.

Pro-Ject Stream Box S2 in silver, front view with USB socket

Is it right for you?

A great fit if you…

Want to add network streaming to an amplifier or active speakers
Want a small streamer that can join a multiroom setup
Need fixed and variable analogue outputs, or an optical output for an external DAC

Worth knowing

It is a streamer, not an amplifier. It needs an amplifier or active speakers
Multiroom playback runs at CD quality (16-bit / 44.1 kHz), and the zone count depends on Ethernet or WiFi
WiFi is 802.11 b/g/n

Build your system

Pro-Ject builds the Stream Box S2 to sit alongside its other compact components.

Amplifier: Connect it to an integrated amplifier from our stereo amplifier range
Speakers: Add a pair of bookshelf speakers
External DAC: Use the optical output with a converter such as the Pro-Ject DAC Box E
More Pro-Ject: See the Pro-Ject range

Specifications

Streaming

Audio formats	MP3, FLAC, WAV, ALAC, APE, AAC
Resolution	Up to 24-bit / 192 kHz
Streaming services	TIDAL, Spotify
Internet radio	TuneIn, iHeartRadio
Protocols	AirPlay, UPnP, DLNA
DAC	ESS9023
Multiroom	Up to 10 devices (Ethernet) / 6 devices (WiFi)
Control	Pro-Ject Stream S2 app (iOS and Android)

Connections

Inputs	1 x USB-A, network (Ethernet, WiFi), 1 x 3.5 mm line in
Outputs	1 x RCA (fixed), 1 x 3.5 mm (variable), 1 x optical (S/PDIF)
WiFi	802.11 b/g/n

Size

Dimensions (W × H × D)	103 × 37 × 122 mm

Specifications from Pro-Ject Audio Systems (Stream Box S2 product page and product information sheet), checked November 2026. Weight is not listed because Pro-Ject's page and sheet disagree (375 g and 355 g).

Questions people ask

Is it an amplifier?

No. It is a network streamer with analogue and optical outputs. You need an amplifier or active speakers.

Which streaming services does it support?

Pro-Ject lists TIDAL and Spotify, with TuneIn and iHeartRadio for internet radio. It also supports UPnP, DLNA and AirPlay.

Can I use more than one?

Yes. Pro-Ject says several units can form a multiroom setup, and two units can be paired as a stereo pair.

How do I control it?

With the Pro-Ject Stream S2 app for iOS and Android.