Innuos STREAM3 Music Streamer & Server

We'll be honest: we initially underestimated the STREAM3. Coming to it after spending time with the ZEN Next-Gen and ZENith Next-Gen, it was easy to assume a lower price point meant a lesser product. That assumption was wrong. After a month with the STREAM3 and PhoenixDAC in-house, it's clear this isn't a compromise — it's a genuinely different kind of machine, with its own power supply architecture, its own connectivity strengths, and a flexibility that the Next-Gen platform doesn't offer. The STREAM3 replaces the ZENith Mk3 and the PULSAR in the Innuos lineup. It's priced below the ZEN Next-Gen, but it isn't below it in the ways that matter most.

The biggest thing to understand about the STREAM3 is that it's a platform. You configure it for your system, then reconfigure it later if your system changes. That starts with the output module and runs all the way through to whether you want a DAC built in at all. More on that in a moment.

The ARC6-CX Power Supply

This is the heart of the STREAM3's sonic character, and it's worth understanding what Innuos did here. The ARC6-CX module was developed in collaboration with Dr. Sean Jacobs — the same designer behind the external power supplies used in some of the most respected digital components on the market. It combines active rectification, Gallium Nitride CX power regulation, and 132,000uF of Mundorf capacitance onto a single module, fed by a large 300VA toroidal transformer and medical-grade AC filtering upstream.

That's a meaningful power supply by any standard. What it produces in practice is a deeply quiet, natural presentation — not etched or analytical, but settled and stable in a way that lets the music come forward without edge. Spend time with the STREAM3 and you stop noticing the hardware. That's usually the sign of a well-engineered power supply working correctly.

Processing, Memory, and the Real-Time Kernel

The STREAM3 runs a 13th-generation Intel quad-core processor with 8GB of industrial-grade DDR5 RAM — faster memory than the DDR4 in the Next-Gen series. Innuos claims more than 200% faster processing throughput compared to the Mk3 platform, and in use it shows: library scanning, metadata resolution, Roon Core duties under heavy DSP load — none of it causes hesitation.

The OS runs on a dedicated TLC SSD with power-loss protection, separate from any music storage. And like the ZEN Next-Gen and ZENith Next-Gen, the STREAM3 runs Sense on a real-time Linux kernel. That's not a marketing claim — real-time Linux only landed in the mainline kernel in late 2024, and Innuos has built it into their OS to minimize audio processing latency and eliminate non-audio interruptions at the system level.

The Output Module: Where the Decision Gets Interesting

The STREAM3 ships without an output module by default, with three USB outputs on the rear. What you choose for that module slot shapes the character of the product significantly — and the range is wider here than on any other Innuos box.

• The Standard DAC Board adds RCA analogue output plus optical and coaxial S/PDIF. PCM up to 24bit/192kHz. Entry-level integration for systems that don't yet have a DAC.
• The PerformanceDAC Board steps up to a current-generation AKM chip with high-grade TCXO clocks, independent power supplies for digital and analogue stages, and support for PCM to 32bit/768kHz and Native DSD. RCA only.
• The PhoenixDAC Board is the one most people end up with — and for good reason. Dual mono AKM DAC chips, an OCXO clock plus two FemtoClocks for audio, independent power supply for digital and analogue, RCA and XLR outputs. This is a serious integrated DAC, designed in partnership with Dr. Sean Jacobs to work with the ARC6-CX PSU. In our experience paired with the STREAM3, the detail retrieval competes with standalone DACs well above its price. It's lively, dynamic, and resolving without being clinical — though it rewards warmer downstream components and speakers.
• The PhoenixUSB Board regenerates and reclocks the USB output — 3ppb 24MHz OCXO clock, LT3045 linear regulators throughout, no switching regulators near the USB chip. For users with a capable external DAC.
• The SPDIF Board adds AES, coaxial, and optical outputs up to 24bit/192kHz. The right choice for DACs that prefer S/PDIF over USB.
• The PhoenixI2S Board bypasses the digital receiver and connects directly to the DAC chip over HDMI. Two FemtoClocks, 3ppb main clock, eight pin configurations, DSD support up to DSD1024. The highest-performance output option for DACs with a quality I2S input.

All modules are available at purchase or retrofitted later. The physical slot design is the same across STREAM3, ZEN Next-Gen, and ZENith Next-Gen — so the boards transfer if you ever move up the range.

Connectivity and the Remote

The STREAM3 is the first Innuos server/streamer to include 2.5GbE Ethernet ports rather than standard gigabit — two of them, bridged, so one connects to your network and the other passes through to another device. Future-facing, and a meaningful upgrade for high-resolution streaming and large local library transfers.

USB-C appears for the first time in the Innuos lineup, handling high-speed drives, external DACs, or device charging. CD ripping works via any external USB optical drive, with Innuos's established ripping engine handling drive-head alignment, FLAC Level 0 or WAV output, and metadata from Discogs, MusicBrainz, FreeDB, and GD3.

The STREAM3 also includes the Innuos Stream Remote — a physical infrared remote with numbered preset buttons you configure through the Sense app. Playlists, radio stations, streaming favorites: assign them to buttons and access them instantly. Tactile and immediate in a way that app control isn't. It's a small thing that matters more than expected in everyday use.

Storage

Run it as a pure streamer with no storage at all, or add an M.2 NVMe SSD — 2TB, 4TB, or 8TB, factory-fitted or self-installed. The accessible expansion bay is on the rear panel. Innuos's Sense app handles library management across local storage, NAS, and streaming services in a unified view.

Where It Fits

The STREAM3 occupies a distinct position. It's less expensive than the ZEN Next-Gen, but its output module options — especially the PhoenixDAC — give it capabilities the Next-Gen platform can't match without adding external DAC hardware. If you're running a good integrated amplifier with a built-in DAC, or want a one-chassis digital front end with analogue outputs, the STREAM3 with PhoenixDAC is the most coherent answer in the Innuos range. If you already own a capable external DAC, configure it with the PhoenixUSB or PhoenixI2S board and keep it as a transport.

It also pairs well upstream with a PhoenixNET switch — Innuos bundles the switch at a discount when purchased with a STREAM3, which is worth asking about.

Press Recognition

Hi-Fi+, Alan Sircom — Issue 254. Sircom characterized the STREAM3 as something more versatile and complete than a typical digital front end: a platform that adapts to serve as a one-box server, a server with integrated DAC, or a pure streamer combining local and online music. He called it the next system upgrade — and meant it without qualification. Read the review.

Additional recognition: Super AV Award 2025; Audio Art Best Value Award 2026.

We've had the STREAM3 with PhoenixDAC in-house for an extended period and published our own impressions. The short version: it surprised us. The longer version is on our blog. Read our take here.

Specifications

• Processor: 13th Gen Intel quad-core
• RAM: 8GB DDR5 industrial-grade
• OS Storage: Dedicated TLC NVMe SSD with power-loss protection
• Music Storage: Optional M.2 NVMe SSD — 2TB, 4TB, or 8TB (factory fitted or user installed)
• Power Supply: ARC6-CX LPSU — active rectification, CX power regulation, 132,000uF Mundorf capacitance, 300VA toroidal transformer, medical-grade AC filtering; co-designed with Dr. Sean Jacobs
• USB Audio Outputs: 3 x USB (including USB-C) — up to 32bit/768kHz PCM
• Optional Output Module (Standard DAC Board): RCA analogue, optical, coaxial S/PDIF — up to 24bit/192kHz PCM
• Optional Output Module (PerformanceDAC Board): AKM DAC, TCXO clocks, RCA analogue — up to 32bit/768kHz PCM, Native DSD
• Optional Output Module (PhoenixDAC Board): Dual mono AKM DAC, OCXO + FemtoClocks, independent PSU, RCA and XLR analogue — up to 32bit/768kHz PCM, Native DSD; co-designed with Dr. Sean Jacobs
• Optional Output Module (PhoenixUSB Board): Reclocked USB 2.0 output — 3ppb 24MHz OCXO, LT3045 regulators — up to 32bit/768kHz PCM, DSD512 via Native DSD
• Optional Output Module (SPDIF Board): AES, coaxial, optical — up to 24bit/192kHz PCM
• Optional Output Module (PhoenixI2S Board): I2S via HDMI — 3ppb clock, dual FemtoClocks, 8 pin configurations — up to 32bit/768kHz PCM, Native DSD up to DSD1024
• Network: 2 x 2.5GbE Ethernet RJ45, bridged
• Chassis Ground: 4mm speaker plug port
• Supported Sample Rates: 44.1, 48, 88.2, 96, 176.4, 192, 352.8, 384, 768kHz; DSD64–DSD512 (DSD1024 via PhoenixI2S)
• Bit Depths: 16bit, 24bit, 32bit
• Playback Formats: WAV, AIFF, FLAC, ALAC, AAC, MP3, DSF, DFF
• CD Ripping: Via external USB optical drive; FLAC (Level 0) or WAV; metadata from Discogs, FreeDB, GD3, MusicBrainz
• Streaming: Qobuz, Qobuz Connect, Tidal, Tidal Connect, Deezer, HighResAudio, IDAGIO, Spotify Connect, Internet Radio, Radio Paradise FLAC
• Control: Innuos Sense app (iOS, Android, Kindle Fire, web browser); includes Stream Remote with numbered preset buttons
• Optional Modes: Roon Core, Roon Endpoint, HQPlayer NAA Endpoint, AssetUPnP Server
• Operating System: Sense 3 with Real-Time Linux Kernel
• Chassis: 10mm CNC-machined bead-blasted anodized aluminum
• Finish: Black or Silver
• Dimensions: 420 x 330 x 85mm (W x D x H)
• Weight: 12.8 kg
• Mains: 115V / 230V AC (switchable)
• Includes: Stream Remote, AC power cable (2.0m), Ethernet cable (2.0m), quick start guide
• Country of Origin: Portugal

Which module makes sense for your system — and whether you need storage — depends on what you're connecting it to. We've lived with this one. Happy to think it through with you.