SOtM sMS 500 Server

SOtM sMS-500 Network Streamer & Music Server

The Next Generation Begins. Technology Exists to Serve Music.

The SOtM sMS-500 Network Streamer introduces a new generation of high-end digital audio playback, combining a completely redesigned hardware platform with SOtM’s established Eunhasu operating system.

Developed as the next step beyond the acclaimed sMS-200, the sMS-500 brings together dedicated audio engineering, advanced processing capabilities, low-noise design and exceptional software flexibility.

At SOtM, technology has always served a specific purpose: allowing listeners to experience music with the greatest possible integrity, naturalness and emotional involvement.

The sMS-500 continues this philosophy through a newly engineered architecture created specifically for modern network audio systems.

Whether used with Roon, Qobuz Connect, HQPlayer, UPnP or other supported playback environments, it provides a versatile digital transport for compatible external USB DACs.

A New Chapter in SOtM Network Audio

For more than a decade, the original sMS-200 has been one of SOtM’s most recognised network audio products.

Its popularity was established through a combination of compact construction, specialised hardware and support for several different digital music playback systems.

With the sMS-500, SOtM has taken the opportunity to reconsider the platform from the ground up.

Rather than simply introducing a faster version of the original product, the company has developed a new generation of network audio hardware intended to support both present and future digital music applications.

The motherboard, processing architecture and power distribution have been redesigned as parts of a dedicated audio platform.

The objective is to reduce unwanted electrical noise, maintain reliable digital data transmission and provide the operating stability required by demanding music playback systems.

The result is a modern network streamer that continues the SOtM design philosophy while extending the possibilities of the original sMS-200 family.

Completely Redesigned Hardware Architecture

The sMS-500 incorporates a newly developed computing platform based on a 64-bit quad-core ARM Cortex-A53 processor.

This architecture provides the processing resources required by the Eunhasu operating environment and its compatible audio playback applications.

The platform also includes:

• Quad-core ARM Cortex-A53 CPU
• ARM Mali-T720 multi-core graphics processor
• 3 GB LPDDR3 system memory
• Integrated floating-point processing
• Integrated video and graphics processing hardware
• Dedicated USB audio output
• Gigabit Ethernet connectivity
• microSD-based operating system installation

Although the processor incorporates additional graphics and multimedia hardware, not all available processor functions are supported by the Eunhasu operating system.

The sMS-500 is designed primarily as a specialist audio platform, not as a general-purpose multimedia computer.

Dedicated High-End USB Audio Output

The SOtM sMS-500 Network Streamer incorporates a dedicated audio-grade USB 2.0 Type-A connection.

This interface is specifically intended for digital audio output to a compatible external USB DAC.

The manufacturer has paid particular attention to the USB output architecture, including the electrical power environment, clock-related design considerations and signal transmission.

By providing a specialised USB audio output separate from the conventional USB connections, the sMS-500 offers an installation approach intended for demanding digital audio systems.

The dedicated audio output is rated for a maximum connected-device current of 1.0A.

A suitable USB audio cable should be used between the sMS-500 and the DAC.

The sMS-500 is a digital transport rather than a conventional analogue-output DAC. A compatible external USB DAC is required for normal stereo playback through analogue amplification.

Three USB Connections for Flexible Operation

In addition to its audio-grade USB interface, the sMS-500 offers two general-purpose USB ports.

• Audio-grade USB 2.0 Type-A: dedicated digital audio output, maximum 1.0A.
• USB 3.1 Gen 1 Type-A: general-purpose USB connection, maximum 2.0A.
• USB 2.0 Type-A: additional USB connection, maximum 1.0A.

The general-purpose ports may be used with compatible external storage devices and supported accessories, according to the operating system configuration.

The manufacturer recommends using a standard USB port rather than the dedicated audio-grade USB connection for external music storage.

Advanced Eunhasu Operating System

The sMS-500 uses SOtM Eunhasu OS, a Linux-based operating environment developed specifically for the company’s network audio products.

Eunhasu combines a dedicated music playback architecture with a practical web-based configuration interface.

The sMS-500 implementation has been optimised for its new hardware platform, allowing the operating system to take advantage of the updated processor and associated interfaces.

Its flexibility allows listeners to select different playback ecosystems according to their preferred music library, streaming subscription and digital audio configuration.

Software availability and features may change with Eunhasu updates. Individual services may require licences, subscriptions or additional compatible equipment.

Roon Ready Network Streaming

For listeners using the Roon ecosystem, the sMS-500 supports Roon Ready endpoint operation.

A compatible Roon Server or Roon Core manages the music library and playback environment, while the sMS-500 operates as the network-connected digital audio endpoint.

Music can then be delivered through the dedicated USB audio output to a compatible DAC.

This makes the sMS-500 an appealing option for Roon users seeking a dedicated network audio transport.

Qobuz Connect

Qobuz Connect support is included in the manufacturer’s published software feature list.

This allows compatible Qobuz playback arrangements to be integrated with the sMS-500, subject to the installed Eunhasu version and the service’s current requirements.

For subscribers who use Qobuz as their main source of digital music, this provides an alternative to relying exclusively on a separate third-party playback application.

HQPlayer NAA and HQPlayer Embedded

The sMS-500 supports two important HQPlayer-related operating environments.

HQPlayer Network Audio Adapter (NAA) allows the device to function as a compatible network audio endpoint for a separate HQPlayer processing system.

HQPlayer Embedded provides another supported software option on the manufacturer’s feature list, with actual capabilities and licensing requirements dependent on the available Eunhasu implementation.

These options make the sMS-500 interesting for enthusiasts who use specialist digital filtering, upsampling and advanced computer-audio playback methods.

Maximum PCM and DSD playback capabilities depend on the software, USB output implementation and the connected DAC.

UPnP, DLNA and OpenHome

For listeners who prefer an open network audio environment, the sMS-500 supports UPnP audio rendering with OpenHome compatibility.

These protocols allow playback to be controlled through suitable network audio applications and compatible music server software.

Music stored on a supported NAS or another network source can be accessed according to the selected playback environment.

MPD, LMS and Squeezelite

The sMS-500 also supports Music Player Daemon, Logitech Media Server and Squeezelite.

These applications offer alternative music library and playback systems for enthusiasts who prefer established open or server-based audio platforms.

The ability to select different software environments is one of the defining strengths of Eunhasu.

Diretta Host and Target

The manufacturer’s feature list includes support for Diretta Host and Target configurations.

Diretta is a specialist network audio technology that can be incorporated into compatible digital playback systems.

Correct operation requires suitable software, network equipment and a supported system configuration.

The availability of individual operating modes should be checked against the installed Eunhasu release.

Additional Audio Software

Beyond Roon, HQPlayer and the major network audio protocols, the published software platform includes:

• Shairport-sync
• LibreSpot
• MinimServer
• BubbleUPnP Server
• Automatic CD ripping using a compatible external USB CD drive

This extensive software support allows the sMS-500 to accommodate a broad range of music listening preferences.

Not every service must be used simultaneously, and some playback applications may require exclusive use of the audio output or separate configuration.

Gigabit Ethernet Connectivity

The sMS-500 includes a Gigabit Ethernet network interface for connection to compatible home networks and dedicated audio networking systems.

A wired Ethernet connection provides a practical and reliable foundation for high-resolution network audio streaming.

The manufacturer recommends wired Ethernet for the most stable playback environment.

Wi-Fi operation may also be possible using a supported USB Wi-Fi adapter based on the Realtek RTL8812AU chipset, subject to the current Eunhasu software configuration.

Using External USB Music Storage

The sMS-500 can be used with compatible USB storage devices for local music playback.

SOtM recommends a storage device using a single partition, since multi-partition devices may not mount correctly.

Externally powered USB hard drives are recommended for improved operating stability.

The manufacturer suggests storage capacities of up to 2 TB for reliable use in its documented configuration.

Connect storage to a general-purpose USB port rather than the dedicated audio-grade USB output.

Music stored on compatible external drives can be accessed through supported applications including MPD, Squeezelite and MinimServer.

HDMI 2.0a Connectivity

The hardware platform incorporates an HDMI 2.0a output with support for 4K video and HDMI audio at the processor-board level.

However, this is not the same as the specialised I²S-over-HDMI digital audio connection used by certain high-end DACs.

Not every processor-board feature is supported by Eunhasu OS, so HDMI functionality should be confirmed for the intended application.

For conventional high-end audio playback, the manufacturer’s specified connection method uses a compatible external USB DAC.

Low-Noise Power Supply Architecture

Power quality is a fundamental part of the SOtM design philosophy.

The sMS-500 has been engineered with a particular emphasis on the electrical environment surrounding its digital processing and audio output circuitry.

The standard input specification is 7V to 15V DC, with a maximum stated power consumption of 30 watts.

An optional +5V input configuration is also identified by the manufacturer.

The standard DC connection is a 5.5mm outer diameter / 2.1mm inner diameter barrel connector with a 5A rating.

Always confirm the selected hardware version, connector polarity and required input voltage before connecting an external power supply.

Upgrade Your System with the SOtM sPS-550

For listeners looking to develop a complete SOtM digital audio system, the
SOtM sPS-550 Power Supply
is an especially relevant companion.

The sPS-550 offers eight selectable DC output voltages, including settings within the normal input range of the sMS-500.

Its high-performance power supply architecture and maximum 80W power capacity make it a suitable system-matching candidate when correctly configured.

Before connecting the two components, confirm the appropriate DC voltage, output polarity and cable configuration.

Do not select the sPS-550’s 5V output unless the sMS-500 is specifically equipped with the optional 5V input configuration.

The sPS-550 can form an important part of a carefully developed SOtM digital audio system, while still being useful with other compatible DC-powered products.

The SOtM Digital Audio Ecosystem

The sMS-500 can be integrated with a wider selection of specialised SOtM components.

Potential system additions include:

• sPS-550: dedicated low-noise DC power supply.
• sNH-10G: network switch designed for high-end audio environments.
• cBL-USBm: dedicated USB audio cable.
• dCBL-CAT8M: network cable for compatible Ethernet audio installations.

SOtM’s wider range also includes dedicated clock and digital audio interface products.

Each additional component should be selected according to the actual system configuration rather than assuming that every accessory provides a universal improvement.

SOtM sMS-500 vs sMS-200

The original SOtM sMS-200 established the company’s reputation for compact and versatile network streaming hardware.

The sMS-500 represents a new platform rather than a simple processor replacement.

It introduces a redesigned motherboard, ARM Cortex-A53 processing architecture, 3GB system memory and a wider selection of physical USB connections.

The newer platform also supports additional software possibilities through the evolving Eunhasu environment.

For existing sMS-200 users, the sMS-500 offers a modern foundation with extended hardware capabilities.

However, actual audible differences should be assessed in the same audio system and with comparable playback settings.

SOtM sMS-500 vs sMS-2000

The SOtM sMS-2000 Network Streamer & Music Server occupies a different position within the manufacturer’s range.

The sMS-500 is a compact ARM-based network audio transport, designed for flexible streaming with an external USB DAC.

The sMS-2000 is a much larger, more elaborate Intel-based music server platform with dedicated SOtM USB, Ethernet, clock and ATX power supply hardware, together with extensive internal storage expansion capabilities.

Both products reflect the SOtM approach to digital audio, but their processing architectures, physical construction and intended system roles differ significantly.

The SOtM Listening Philosophy

SOtM approaches high-end network audio with the belief that careful hardware engineering and low-noise operation can contribute to more natural music playback.

The sMS-500 continues that philosophy with a dedicated hardware and software platform.

The manufacturer’s objective is to preserve musical information while reducing unwanted electrical disturbances associated with digital processing and transmission.

Perceived differences in transparency, spatial presentation and musical expression will depend on the connected DAC, audio system, network configuration and listening conditions.

International Recognition

The sMS-500 made its international debut at HIGH END Vienna 2026 as one of SOtM’s next-generation audio products.

The manufacturer’s official information describes a new hardware platform designed for the company’s future network audio range.

At the time of this presentation, no specific independently verified magazine award for the sMS-500 has been identified.

For official manufacturer information and updates, visit the
SOtM sMS-500 product page.

Roon Special Offer

Discover Roon with a 60-day trial licence.

SOtM’s published sMS-500 launch offer includes a 60-day Roon trial licence for purchasers, together with an opportunity to obtain a one-year Roon licence at a special price.

Promotional eligibility, duration and availability may be subject to the manufacturer’s current offer conditions. Contact Chameleon Audio for confirmation when ordering.

Key Features

• Next-generation SOtM network audio platform
• Completely redesigned dedicated hardware architecture
• 64-bit quad-core ARM Cortex-A53 processor
• 3GB LPDDR3 system memory
• Specialised audio-grade USB output
• Three USB Type-A connections
• Gigabit Ethernet network interface
• Eunhasu Linux operating system
• Roon Ready network endpoint support
• Qobuz Connect support
• HQPlayer NAA and HQPlayer Embedded support
• UPnP / DLNA and OpenHome compatibility
• MPD, LMS and Squeezelite
• Diretta Host and Target configurations
• Support for compatible USB music storage
• External CD ripping through supported USB drives
• Standard 7–15V DC power input
• Compatible with suitable external power supplies such as SOtM sPS-550
• Compact design suitable for high-end digital audio systems

Manuals and Documentation

SOtM Eunhasu OS Manual

SOtM sMS-500 Simple User Guide (PDF)

Technical Specifications

Note: Certain processor-board features are not supported by Eunhasu OS. Software availability, output compatibility and licensing requirements may vary by installed version.

Frequently Asked Questions

What is the SOtM sMS-500?

It is a high-end network audio streamer using a newly developed ARM-based hardware platform and SOtM’s Eunhasu operating system.

Does the sMS-500 include an analogue DAC?

No. It is intended primarily as a network-connected USB digital audio transport for a compatible external DAC.

Does it support Roon Ready?

Yes. Roon Ready support is included in the manufacturer’s published feature list.

Can it be used with Qobuz?

Yes. The manufacturer lists Qobuz Connect support, subject to the installed software version and service requirements.

Does it support HQPlayer?

Yes. The listed software features include HQPlayer NAA and HQPlayer Embedded.

Can I use an external USB hard drive?

Yes, with compatible storage and an appropriate standard USB port. SOtM recommends a single partition and external power for USB hard drives.

Can I connect the sMS-500 to a HoloAudio DAC?

Yes. Compatible HoloAudio DACs with a suitable USB audio input can be connected to the sMS-500.

Can I use the sPS-550 Power Supply?

Yes, provided the selected output voltage, current capability, polarity and DC cable are compatible with the sMS-500 configuration.

Can I power it with 5V?

Only if the unit is specifically equipped with the optional +5V input configuration. Standard units require +7V to +15V DC.

Is the HDMI connector an I²S digital output?

No. The specified HDMI 2.0a hardware connection should not be confused with specialist I²S-over-HDMI connections on certain DACs.

Does it support Wi-Fi?

Supported Wi-Fi operation is possible through a compatible USB adapter using the Realtek RTL8812AU chipset, according to SOtM’s guidance. Ethernet remains the preferred connection.

Does the sMS-500 require an Internet connection?

The manufacturer specifies an active Internet connection for normal system operation and functionality. Certain local playback arrangements may have different requirements, subject to software configuration.

Is the sMS-500 better than the sMS-200?

The sMS-500 is a new hardware generation with different processing, connectivity and software capabilities. Audible performance differences depend on the system.

What is the difference between sMS-500 and sMS-2000?

The sMS-500 is a compact ARM network transport, while the sMS-2000 is a larger Intel-based reference music-server platform with additional specialist hardware and extensive storage expansion.

Does the sMS-500 have international awards?

The product was introduced at HIGH END Vienna 2026. No independently verified magazine award specific to the sMS-500 has been identified at present.

Why Choose the SOtM sMS-500?

The SOtM sMS-500 Network Streamer brings together a next-generation audio hardware platform, dedicated USB audio output and extensive software compatibility in a compact component.

Its flexibility makes it an appealing digital transport for listeners using Roon, HQPlayer, Qobuz and other supported music playback environments.

With careful engineering and the ability to integrate with specialised SOtM accessories, the sMS-500 provides a versatile foundation for an advanced digital music system.

The Next Generation Begins.

Availability and International Orders

Contact Chameleon Audio for current sMS-500 availability, international shipping, compatible external power supplies, USB DAC matching and personalised advice on building your next-generation SOtM streaming system.