SOtM sPS-550 Power Supply

SOtM sPS-550 High-End Audio Power Supply

Clean Power. Stable Performance. Better Music.

The SOtM sPS-550 Power Supply is a high-performance, low-noise DC power supply developed specifically for demanding digital audio systems.

Designed to provide stable and carefully controlled electrical power, the sPS-550 brings together SOtM’s extensive experience in audio power supply engineering, flexible voltage selection and generous current delivery.

With eight selectable output voltages and a maximum power rating of 80 watts, the sPS-550 offers a versatile power solution for compatible network streamers, digital audio interfaces, clock-related accessories and other DC-powered audio equipment.

Rather than simply supplying electricity, its design addresses the importance of power quality within the complete audio system.

The Foundation of High-End Digital Audio

In a digital audio system, the power supply is much more than a component that keeps the equipment operating.

Electrical power quality, voltage stability, noise and the behaviour of the connected load can all influence the operating conditions of sensitive electronic circuits.

SOtM has developed the sPS-550 with particular attention to unwanted electrical noise, including disturbances originating from the AC mains and electrical noise generated by the connected devices themselves.

The manufacturer’s proprietary power supply architecture is intended to control these interactions and provide a cleaner electrical environment for compatible audio components.

Its objective is to support stable operation while allowing the connected equipment to perform according to its design potential.

The precise audible result will depend on the connected equipment, its own internal power regulation, the installation and the complete audio system.

Proprietary SOtM Low-Noise Power Technology

The sPS-550 builds upon SOtM’s established approach to audio power supply engineering.

Unlike a conventional power adapter designed primarily around the basic requirements of voltage and current, the sPS-550 incorporates a specialised low-noise design intended for sensitive audio applications.

SOtM recognises that electrical noise does not necessarily originate exclusively from the mains supply.

Network interfaces, digital processors, USB circuitry and switching electronics within connected components can also produce electrical disturbances.

These disturbances may propagate through shared power connections and influence other parts of an audio system.

The sPS-550 is designed to manage both externally introduced noise and unwanted electrical disturbances associated with connected equipment.

This approach is central to the manufacturer’s philosophy of treating the audio system as a complete electrical environment rather than a collection of unrelated components.

Eight Selectable DC Output Voltages

One of the defining advantages of the SOtM sPS-550 Power Supply is its extensive voltage flexibility.

The unit provides eight selectable output voltages:

• 5V DC
• 7V DC
• 9V DC
• 10V DC
• 12V DC
• 15V DC
• 17V DC
• 19V DC

The appropriate voltage is selected using the rear-panel voltage selector.

This flexibility allows one power supply model to support a variety of compatible audio devices with different DC power requirements.

Important: The output voltage must always match the requirements of the connected equipment. The DC connector, polarity, current capacity and cable wiring must also be verified before making a connection.

Never change the voltage setting while the connected equipment is powered. Disconnect the equipment and follow the manufacturer’s instructions before adjusting the output voltage.

Up to 80 Watts of Output Power

The sPS-550 offers a maximum specified DC output power of 80 W, providing substantially greater power capacity than many compact external DC power supplies.

This makes the unit relevant for equipment with significant current requirements, subject to the selected output voltage.

The maximum current available depends on the voltage setting:

These values are the manufacturer’s specified current limits. They are not all equivalent to continuous operation at 80 W, and the equipment’s actual operating current must remain within the applicable ratings.

Protection and Operational Reliability

The sPS-550 incorporates protective features intended to safeguard the supply under abnormal operating conditions.

The manufacturer’s technical specifications explicitly identify:

• Output short-circuit protection
• Over-temperature protection

The product description also identifies over-voltage and over-current protection as part of its design. For exact protection thresholds and operating behaviour, consult the current SOtM documentation.

The supply includes a DC output on/off switch, an operating indicator LED and a separate rear-panel AC power switch.

Designed for the SOtM Audio Ecosystem

The sPS-550 has been developed to complement SOtM’s wider range of digital audio products.

Depending on their exact voltage, current, connector and polarity requirements, potential applications include compatible SOtM streamers, network equipment and USB audio accessories.

Particular system-matching candidates include the SOtM sMS-500, sNH-10G and tX-USBultra, provided their individual power specifications are confirmed.

The sMS-2000 may also form part of a wider SOtM system alongside an sPS-550, but the sPS-550 must not be treated as a direct replacement for the sMS-2000’s internal mains or ATX power supply.

Where external power connections are used, suitable SOtM-approved DC cables and connection arrangements should be selected.

SOtM sPS-550 and Network Audio

Digital audio networking equipment can include Ethernet controllers, switching circuitry, clock systems and various internally regulated power domains.

SOtM places particular emphasis on electrical noise management throughout this signal chain.

A suitable external power supply may improve the electrical operating environment of compatible network audio equipment.

Any resulting sonic differences should be assessed within the complete system and are not guaranteed for every device or installation.

SOtM sPS-550 vs sPS-500

The sPS-550 extends the versatility of the earlier SOtM sPS-500 with additional voltage options and greater specified maximum output power.

The original sPS-500 provides four selectable output voltages: 7V, 9V, 12V and 19V.

The sPS-550 increases this selection to eight voltages, adding 5V, 10V, 15V and 17V.

It also raises the headline maximum power capability to 80 W, compared with the sPS-500’s mains-dependent maximum of approximately 45–55 W.

The sPS-550 is therefore particularly interesting when a system requires one of the additional output voltages or more current capability.

As always, correct electrical compatibility is more important than the nominal power rating alone.

Choosing the Correct DC Power Connection

Before connecting the sPS-550 to another component, verify the following:

• The required DC output voltage
• The maximum current consumption of the device
• The connector type and dimensions
• The DC output polarity and pin arrangement
• The suitability of the selected power cable

Never assume that two devices using the same DC voltage automatically have compatible power connectors.

Incorrect voltage or polarity can cause permanent damage to electronic equipment.

Key Features

• High-performance SOtM audio-grade DC power supply
• Eight selectable DC voltages from 5V to 19V
• Maximum specified output power of 80W
• Proprietary low-noise electrical design
• Developed to manage noise originating from both mains power and connected devices
• Generous current capacity for compatible digital audio equipment
• Output short-circuit and over-temperature protection
• Separate AC and DC power controls
• Wide-range AC input from 100V to 240V
• Suitable for compatible SOtM and other DC-powered audio equipment
• Compact construction with an approximate weight of 2 kg

International Reviews & Recognition

The sPS-550 is a recently introduced addition to SOtM’s power supply range.

At present, the official product page provides detailed technical information but does not list an independent magazine award or a dedicated review for this model.

For confirmed updates and manufacturer information, visit the official SOtM sPS-550 product page.

Manual

Download the SOtM sPS-550 User Guide (PDF)

Technical Specifications

Complete Your SOtM Digital Audio System

Discover the

SOtM sMS-500 Network Streamer
,
a next-generation high-end network audio player featuring SOtM’s advanced hardware architecture and Eunhasu operating system.

Pair it with the SOtM sPS-550 Power Supply using a compatible DC connection to build a refined digital audio system with stable, low-noise power delivery.

Frequently Asked Questions

What is the SOtM sPS-550?

The sPS-550 is a high-performance DC power supply designed for compatible digital audio and computer-audio equipment.

How many voltage settings does it offer?

It offers eight selectable DC output voltages: 5V, 7V, 9V, 10V, 12V, 15V, 17V and 19V.

What is the maximum output power?

SOtM specifies a maximum output power of 80W under the manufacturer’s stated operating conditions.

Is the sPS-550 an upgrade over the sPS-500?

It offers a wider choice of output voltages and greater maximum specified power capacity. The best choice depends on the requirements of the connected equipment.

Can it power an SOtM sMS-500?

It is intended for integration with compatible SOtM equipment, including the sMS-500, when the electrical ratings and DC connector configuration are correct.

Can it power an sNH-10G network switch?

Potentially, yes, provided the particular switch configuration requires a voltage and current that the sPS-550 can supply and a suitable DC cable is used.

Can it replace the internal power supply of an sMS-2000?

No. The sPS-550 should not be treated as a replacement for the sMS-2000’s internal mains or ATX power supply.

Does it automatically detect the voltage needed?

No. The output voltage is selected manually and must match the connected device’s requirements.

Can I change the voltage during operation?

No. Power down and disconnect the equipment before changing the voltage selection, following the manufacturer’s instructions.

Does it work with non-SOtM products?

It may be used with other DC-powered equipment when the voltage, current, polarity, connector and cable wiring are all compatible.

Can the sPS-550 improve sound quality?

It is designed to provide low-noise, stable DC power. Audible results depend on the connected equipment and complete audio system and cannot be guaranteed.

Does it support worldwide mains voltage?

Yes. The published AC input range is 100–240V at 50/60Hz, subject to using an appropriate power connection.

What protection circuits are provided?

The official specification identifies output short-circuit protection and over-temperature protection.

What are its dimensions?

The sPS-550 measures approximately 106 × 48 × 230 mm and weighs around 2 kg.

Why Choose the SOtM sPS-550?

The SOtM sPS-550 combines broad voltage compatibility, substantial current capability and specialised power supply engineering within a compact component.

It is an attractive choice for enthusiasts who want to provide suitable digital audio equipment with a carefully engineered external DC power supply.

Clean Power. Stable Performance. Better Music.

Availability and International Orders

Contact Chameleon Audio for current availability, suitable DC cables, compatibility advice and international shipping options for the SOtM sPS-550 Power Supply.