24. June 2021 · Comments Off on iFi ZEN Stream · Categories: Hifi News · Tags: , , , , , ,


iFi has launched the iFi ZEN Stream, their new flexible and affordable Wi-Fi audio transport.

There are various ways in which Wi-Fi streaming can be incorporated into an audio system. Amps with integrated Wi-Fi reception are available, as are dedicated audio streamers, many with onboard DACs –these serve the purpose of a traditional HiFi source component, such as a CD player. But there are drawbacks, some solutions offer less-than-ideal sound quality, others lock you into a specific streaming platform or ‘walled garden’ system, while some specialised solutions are prohibitively expensive.

iFi ZEN Stream

The new iFi ZEN Stream WiFi Audio Transport


Designed to give a new option is the iFi ZEN Stream, the latest addition to the iFi  ZEN Series of compact and affordable audio devices, designed to deliver flexible, high-quality network streaming to any audio environment.

iFi ZEN Stream

Rear view of the iFi ZEN Stream


Described as a ‘Wi-Fi audio transport’, the iFi ZEN Stream acts as a bridge between your Wi-Fi network and your audio system. It connects to a router via Wi-Fi or Ethernet cable and outputs to an external DAC (or an amp with digital inputs) via USB or S/PDIF.


Many audio streaming devices lock users into a specific platform. That is not necessarily a problem, assuming the facilities on offer are in line with the user’s requirements and they are happy with the interface. But, if they want to select their preferred streaming platforms and apps without restriction, with the ability to adapt and evolve as requirements change, a device with an open-source architecture offers clear advantages.

One open-source solution that has been making waves in the audio streaming community is the Raspberry Pi – the well-known single-board computer, which can be used as a music streaming device. After all, an audio streamer is essentially a computer that combines hardware and software to perform a specific task. The Raspberry Pi is effective, inexpensive and not tied to a specific platform, giving the user plenty of streaming options. The flipside, however, is that the Raspberry Pi can be complicated to set up and has not been designed and optimised for high-performance audio straight from the box.

iFi says that the ZEN Stream offers the best of both worlds in one package. Its open-source architecture ensures the user is not tied to a specific platform or app, offering a wealth of options and the ability to add more via programmable firmware. Its Linux-based operating system offers flexibility, with the streaming community encouraged to work with iFi to create additional features to add down the line via OTA (Over The Air) updates.

Coupled with this flexibility is the fact that the iFi ZEN Stream has been designed from the ground up for the sole purpose of high-quality audio streaming. The hardware has been built to deliver the best possible sound quality, working in harmony with iFi’s in-house software development. From the device drivers to the kernel (the heart of the operating system), to the shell (which interfaces with the kernel), to the applications and the user interface, everything is fully optimised for seamless operation and excellent sonic performance.

iFi ZEN Stream

The iFi ZEN Stream with the iFi ZEN DAC


The iFi ZEN Stream supports PCM up to 32-bit/384kHz and DSD up to 11.2MHz (DSD256) over Wi-Fi, as well as over Ethernet cable. There are multiple  ways in which the device can interface with your music collection or favourite streaming service, depending on the user’s preference, and thanks to the ZEN Stream’s open-source architecture these will expand over time. Here are some of the options provided at launch:

Integrated Tidal Connect and Spotify Connect

Users of these hugely popular online music services can stream directly from the Tidal and Spotify apps.

DLNA certification

Any DLNA-compatible streaming app – including iFi’s forthcoming Stream-iFi app – can be used to control the ZEN Stream and access audio content from online services and DLNA-certified network storage devices.

AirPlay and Chromecast

Integrated Airplay and Chromecast ensures easy streaming from Apple and Android devices. AirPlay is included at launch; Chromecast will be added as a free firmware update later this year.

Roon compatibility

The Roon platform has become the standard-bearer for high-quality digital music management and streaming. At launch, the ZEN Stream is compatible with Roon Bridge software, making in suitable for a Roon environment, and full Roon Ready certification is in the pipeline.  With the ZEN Stream, you can add Roon compatibility to any DAC.

NAA operation

The ZEN Stream can operate as an NAA (Network Audio Adapter) in conjunction with Sygnalist HQPlayer software. This means it can direct packets of audio data received over Wi-Fi or Ethernet cable straight to the connected DAC without applying any processing whatsoever.


An ingenious part of the ZEN Stream’s design is the ability to select between ‘exclusive modes’ – individual settings that deliver fully optimised performance by focusing operation on one particular mode of use. The following modes are provided: All-in-one, DLNA streaming, NAA streaming, Roon Bridge streaming and Tidal streaming.


Outwardly, the ZEN Stream is encased in the distinctive dark grey aluminium extrusion that houses every device in iFi’s ZEN Series. Its silver-coloured aluminium faceplate sports two multi-colour LEDs – one to indicate internet/intranet connection and speed; the other to show the incoming audio format and sample rate (these LEDs may be switched off if preferred). There are just two buttons: the power switch and a ‘hotspot’ button, the latter used to join a Wi-Fi network.

iFi ZEN Stream

While there is no display other than the status LEDs, all information about the music being streamed will be displayed on the control app selected by the user. iFi has taken the decision that it is better to focus on performance and value-for-money, rather than increase cost by incorporating a display that would arguably be superfluous to the end-user.


Around the back, alongside the Wi-Fi antenna, reside an array of sockets and ports. Dual-band Wi-Fi reception supports 802.11a/b/g/n/ac for a fast, reliable wireless connection, while a high-grade Gigabit Ethernet port supplies a cabled network option of the highest quality. There’s also a USB-A input, giving the option of playing music from HDD and solid-state storage devices, and a USB-C programming port to upload software/firmware updates (an alternative to OTA updates via Wi-Fi).

Two digital outputs – asynchronous USB and coaxial S/PDIF – provide connection to an external DAC or amp with digital inputs. Both these outputs are regulated by iFi’s femto-precision GMT (Global Master Timing) clock circuitry to eradicate jitter from the digital signal. The USB ports – both input and output – support SuperSpeed USB3.0 and benefit from iFi’s ANC II active noise cancellation to remove distortion from the audio signal. Similarly, the S/PDIF output incorporates iFi’s iPurifier technology.

The ZEN Stream’s circuit design has been engineered with processing muscle supplied by a quad-core ARM Cortex microprocessor. This is accompanied by carefully chosen circuit components including discrete, high-grade surface-mounted devices such as TDK C0G multilayer ceramic capacitors and inductors from Taiyo Yuden and Murata. Regulators with high PSRR (Power Supply Rejection Ratio), low idle current and low dropout voltage are used, together with a synchronous 1.5MHz high-speed power supply controller, further contributing to the ZEN Stream’s pure, distortion-free performance. As befits an audiophile-grade device, the ZEN Stream does not incorporate a noisy fan – instead, iFi has designed low-profile heatsinks to prevent overheating whilst maintaining the unit’s compact size.

iFi ZEN Stream

Rear view of the iFi ZEN Stream and iFi ZEN DAC


Because the ZEN Stream is a network audio ‘transport’, as opposed to a ‘player’ – it outputs a digital signal rather than an analogue one – it can be combined with whichever DAC (Digital-to-Analogue Converter) the user prefers. An obvious partner is iFi’s ZEN DAC a USB DAC with balanced circuit design and the same 158x35x100mm aluminium enclosure. Version 2 of the ZEN DAC has just launched, with enhancements including a new 16-core XMOS chip to process incoming audio data and improvements to iFi’s GMT (Global Master Timing) clock circuitry.

The ZEN DAC also incorporates a headphone amp – which means the ZEN Stream/ZEN DAC combo makes a splendid desktop-size streaming system to use with headphones, as well as with an amp and speakers. Plus, you can upgrade the headphone amp by adding a further ZEN device, the ZEN CAN.


RRP of £399 – available from selected retailers from 25th June

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